Most people change jobs every two years, and, guess what? It’s a good thing to do for your career.

The Bureau of Labor reports that people in their 20s change jobs every 18 months, and CareerJournal reports that 75 percent of all workers are job hunting. All this change has been scoffed at by people who say the word “job hopper” with a sneer, but if you want to be engaged and passionate about your career, frequent change is probably a silver bullet.

Troy Jackson, who has had stints in Fortune 500 companies, a startup, and Harvard Business School, explains the rationale for changing jobs: “Being in a new position and doing something for a year or two is great. But later, the things that are not as appealing about the job start to wear on you. So changing positions or going to a new environment keeps you excited and keeps you wanting to learn.”

But let’s be clear: Haphazard change, leaving job after job for frivolous reasons – like you want a cubicle near a window- is not going to get you far in terms of finding engaging work. But switching jobs specifically to spark more engagement in your career is a smart.

“The people who win are not necessarily the smartest people, but they’re the people who are able to sustain drive, commitment, passion and engagement,” says David Maister, management consultant and author of the blog Passion, People and Principles. “What it takes to succeed is not intellectually difficult. Everyone knows what to do: Eat less and exercise more, for example. Success is about having the confidence and determination to do it.”

A precursor to sustaining passion, of course, is finding it. Sometimes you can do this with some help from a career coach. Curt Rosengren, for example, specializes in helping people find what they’re passionate about and creating a work life that harnesses that. He says you need to understand what motivates you — for example some people are motivated by competition, and some people are motivated by making personal impact – because those are the goals that will make you most excited.

But in many cases, the intense soul-search is not as effective as just going out and trying jobs until you find one you like. We are not very good at guessing what we’ll like, according to Daniel Gilbert, Harvard psychologist and author of the book, Stumbling on Happiness. He recommends that instead of philosophizing about career passion, just try a lot of jobs to find one that makes you happy.

Once you find that passion, it’s enticing to keep doing the same thing that you’re good at; the work world encourages this, because once people know you are good at something, they will ask you to do it all the time. But after a while, your learning curve plateaus, your personal growth sputters, and then your passion dissipates.

Maister says each of us has three modes: Dynamo, loser and cruiser. The first two are when you are doing something – getting a lot accomplished or failing – and both are important for growth. We all cruise, too, but “the trick is to have a system around you where you don’t let yourself cruise for too long,” says Maister.

So how do you do that? Force yourself out of your comfort zone and try something new. Once you accept that success and failure are both worthy avenues of personal development, it’s easy to understand the importance of trying new things, and risking that they’ll be bad ideas.

Jackson agreed to relocate from North Carolina to Boston, where his wife had a new job, and he started interviewing for jobs. He focused on large companies, because that’s where he had always worked, but in an effort to look at something new, he interviewed at a smaller startup, HiWired.

“It wasn’t until I started interviewing and talking to the people I’d be working with that the opportunity really revealed itself,” he said. By seeing how things were done at HiWired, he better understood the frustration he had at larger companies where getting something done took forever. He also realized that he could have ownership of something large at a startup – in this case, all of marketing.

Now, he realizes that one of the things that energize him about his job is getting things done quickly. Jackson would not have found this opportunity if he had not interviewed at a company outside the normal scope of his targets.

Another way to keep yourself from cruising is to always understand what gets you out of bed in the morning. “Really clarify this, because this is what keeps your momentum,” says Laurence Haughton, management consultant and author of the book It’s Not What You Say…It’s What You Do. To this end, he recommends, “Getting a checkup: Going to the dentist or doctor reminds you to floss or get on the treadmill. Go to a mentor who understands your goals … but will ask you tough questions.”

The problem with finding work that makes you passionate is that we are all passionate about a lot of things that don’t mesh well with work. Sex, for one thing, is something we love to do but don’t do for work.

So when you are deciding your next career step, try using the criteria Maister uses in his own career: “I ask myself three things: Is it as much fun as I thought it would be? Can I get paid for it? Can I make a [notable] contribution with it or will I be just another player?”

A lot of maintaining momentum is actually about dealing with setback. And even a passion maven like Rosengren, says, “It ain’t all sunshine.” So recognize when you need to manage yourself through a bad time, and when you are in cruising mode and need to get out.

And next time someone calls you a job hopper, stand up tall and proud, and tell them it’s a new workplace, and strategic job hopping is a new way to create a passionate career.

When I was in couples therapy with my husband, I nearly died trying to force myself to listen to his ideas when I thought mine were better. But I realized that I had poor listening skills, and by dealing with my listening skills at home, I improved my listening skills at work.

We can learn how to build relationships at work by paying attention to research about how to build them at home.

For example, The Economist reports that men overestimate how attracted women are to them, and women underestimate how interested men are. This research comes from an article in Evolution and Human Behavior, and the conclusion is that the poor estimating is actually good for evolution, because men don’t miss opportunities to spread their DNA, and women make sure to mate with someone who will stick around.

I find that men and women do the same estimating at work, stereotypically speaking. Women try to make a good, solid connection with people, and men assume everyone wants to be their friend via (superficial) sports talk. This is why we read so much about how men are better at networking outside of work and women are better at consensus building at work. Understanding these tendencies can help you know how to expand your relationship skills at work.

Here’s another relationship study that makes me think of work: A good relationship hinges more on expressing joy from someone else’s good news than about how you react to their bad news. Benedict Carey writes in The New York Times that a slew of studies find that your reaction to someone’s good news is an opportunity to strengthen the realtionship. So don’t brush off your spouse when she has a good day at work, and the same goes for your co-worker’s good news — express enthusisam. (Thanks, Mercedes)

Finally, here’s a link my brother sent me, and I keep waiting for it to be relevant to a post, and it never is, but it sort of is today: The intersection of people to work with and people to have sex with – a diagram.

Burnout is as much about your dreams as it is about your work, because burnout is the gap between your expectations and your ability to meet them. Jennifer Senior has a great article in this week’s New York Magazine about about burnout, which I will quote from here.

Burnout is not about how many hours you work, (contrary to Lisa Belkin’s New York Times column this week), but if the hours you work bring you desired results. For example, if you have very flexible hours and can go on an early date and then go back to work after dinner and you get eight hours of sleep, a 100-hour week might be fine for you. In fact, Ayala Pines, professor at Ben-Guiron University at the Negev, found that serial entrepreneurs, known for working very long hours, were the workers least prone to burnout. (Those most prone are pediatric nurses in burn units.)

Burnout doesn’t come from overwork but from an inability to get what you need from the work, according to Christina Maslach, professor at University of California, Berkeley. She created the wideley used Maslach Burnout Inventory to test one’s level of burnout. Senior describes the six areas of burnout to watch for:

1. Working too much
2. Working in an unjust environment
3. Working with little social support
4. Working with little agency or control
5. Working in the service of values we loathe
6. Working for insuficient reward, whether the currency is money, prestige, or positive feedback

The effect of burnout is depersonalization, according to Barry Farber, professor at Columbia University. He says, it’s not that people are uncaring, but “their level of caring cannot be sustained in the absence of results.” Senior describes it more poetically, “People who are suffering from burnout tend to describe the sensation in metaphor of emptiness — they’re a dry teapot over a high flame, a drained battery that can no longer hold its charge.” This is no small thing, and we should all be watching for it.

What can you do? Align your expectations with reality. Senior reports a body of research that shows younger people burn out faster because of thier unrealistic expectations, and older people have more perspective based on their experience. But this is hard to control, because if you don’t have experience what can you do except build it up over years?

Fortunately there is a bit you can control no matter how old you are, because like most research about happiness, it comes down to your connections with other people. Maslach found that married people burn out less often than unmarried because a spouse provides another means for fulfillment besides a job. And Pines found that people are more prone to burnout in a society that values the individual way above the family or community.

So make sure you are reaching your goals and maintaining close friendships, and you probably won’t burn out.

Linda Chernoff is decked out in a black, floor-length gown and heels that kill her at the end of an evening. She has the conversational skills of a socialite and team building talents of a top executive. Her resume could start with her prized “people skills” as an entree to almost any career, but instead, she focuses herself more narrowly: Event planner.

Good move. The best way to ensure you’ll always be in demand is to become a specialist.

In Hollywood terms, this means you should typecast yourself. You know, action hero, funny guy, tough girl. Ezra Zuckerman, professor at the MIT Sloan School of Management spent three years studying actors’ careers and concluded that even though actors see typecasting as deadly, it is, in fact, a ticket to a solid career. Actors who get typecast early on get more work, more consistently.

The typecasting rule applies to other careers; specializing is a way to differentiate yourself in a crowd. Many people describe themselves as generalists so as not to eliminate job prospects. However, specializing makes you more likely to be hired and hunted. Zuckerman explains, “Headhunters are specialized and they look for something they can package and sell. Since a candidate search is specialized, the headhunter is not set up to process people who don’t fit into a specialty.”

As with almost all career advice, solid execution requires knowing where your gifts lie. And, like most people, Linda Chernoff was not initially sure. She started out as a law firm administrator, then worked in publicity at Temple University.

Her favorite part of that job was planning events like golf outings and tailgate parties. Now she is development associate for special events at the Museum of Fine Arts, Boston.

Specialization is the goal, but be wary of too much or too early. If your specialty is marketing on Mars, you’ll be the only person in your field, but you probably won’t get paying gigs. Even a reasonable specialty can go awry if you limit yourself before you know enough.

Liz Ramos, a partner at the consulting firm Bain & Co., wrote, “At Bain, we think it is more and more important as a business person to develop one or more areas of deep expertise over time.”

The path they’ve laid out for their consultants is useful: In the beginning, the focus is on “learning communication techniques and skills for the job.” After two years at the company, Bain emphasizes learning to “manage one’s job and develop as business leaders.”

Only after three to five years does Bain encourage people to “think about if they want to continue in consulting or go to business school or another opportunity such as an entrepreneurial venture.”

Once you get to that last step, you necessarily take yourself out of the running for some jobs. But if you don’t position yourself as extremely good at something, you will never have a chance at a top position.

Opera singer Stephanie Chigas knows this intuitively. She is a Boston-based mezzo-soprano at the beginning of her career. While other opera singers accept chorus roles for supplemental income, she does not. “Some people will say, ‘I’ll do anything that comes my way,’ but I don’t want to do that. I have different goals for myself. It may sound a little snooty, but I want to be a solo singer.”

Snottiness is paying off for Chigas. She’s performed with the Boston Lyric Opera and she’s sung at Carnegie Hall. In fact, snootiness is part of specializing, because committing to a path requires an implicit revelation that you think you’ll succeed.

Conversely, generalizing often looks weak, lacking direction or commitment. Zuckerman says, “Generalizing could be useful as a hedging strategy if you are in a volatile industry.” But if you see yourself going to the top, you need to sell yourself as a specialist, not someone hedging for a darker day.

Of course, it is scary to specialize because there is the chance you’ll choose something in which you can’t succeed. But you can always try again. MIT’s Zuckerman offers hope in the form of Bette Davis. Her career began in the 1930s as a blond bombshell. But there was no spark. So her studio recast her as a vampy, man-slayer type, and she was a hit.

I write a lot about how you have to be liked to get what you want, and how people think they’re more likeable than they are. So I’m always on the lookout for what it really means to be nice, and lately I have been noticing people who are getting to the top of their field by taking nice very seriously: They make it part of their job to figure out ways to be nice.

Being nice means going out of your way to do the unexpected. If you are nice in an expected way, it is common decency. If you are nice in an unexpected way, people notice. This seems fair because to be nice in an unexpected way actually takes a good deal of thought. You have to be very aware of what other people are feeling in order to come up with something customized for them.

For example, a local reporter was trying to hit on an intern, and Barak Obama’s speech cut into the reporter’s plans. The reporter wrote about it, and Obama called him on the phone and said, “I’d like to publicly apologize for messing up your game…” It’s a fun phone call to listen to because it’s so surprising. Being nice is apologizing any time it might make someone feel better, instead of just when you would look terrible not to apologize.

Another example is a popular video blog, lonelygirl15, which looks like a girl in her bedroom posting on YouTube, but it is really an actress in a movie made to look like a girl in a bedroom. The producers of this groundbreaking movie were so conscious of the need to be nice to the audience in order to forge a connection, that Wired reports, they hired someone whose full-time job was to answer peoples’ emails and comments on YouTube.

What is remarkable about the lonelygirl15 example is that the person answering the email had to pretend to be lonelygirl without misleading people. So she didn’t talk about herself. She asked people questions about themselves, and she looked up their pages on MySpace and asked them questions. This drives home the point that when you’re thinking about how to be nice, remember that it’s not about you, it’s about other people.

Thanksgiving is a good time for your career, because practicing gratitude is good for your career.

For one thing, if you write a list of what you’re grateful for each day you are more likely to meet your most important personal goals, according to Robert Emmons, professor of psychology at University of California at Davis.

Susan Quandt found in her research that people who succeed at work are able to look at roadblocks as opportunities because of their inherently optimistic outlook, and this optimism helps people overcome obstacles. Many other researchers have concluded that one’s level of optimism, more than anything else, determines how happy they will be, because happiness is mostly about outlook.

Emmons writes in Science and Theology News that you can affect your level of optimism by practicing gratitude: “A grateful response to life circumstances may be an adaptive psychological strategy and an important process by which people positively interpret everyday experiences. Focusing on the gifts one has been given is an antidote to envy, resentment, regret and other negative states that undermine long-term happiness.”

Practicing gratitude is not that complicated, but of course, not everyone feels grateful toward family on Thanksgiving. Not all families are gems, and there’s a reasons that across the country Thanksgiving is the day for round-the-clock AA meetings. But even in this case, Thanksgiving hones workplace skills. The same skills you need to get along with difficult family are the skills you need to get along with difficult co-workers. Any you can be grateful for this opportunity to practice.

The trick in business is to be consistent and reliable so that people trust you to deliver quality work all the time. But no one can do this all the time. Everyone hides sometimes.

I am pretty good at hiding. My specialty is doing work very fast, mostly because I am so willing to skip over details. So when I fall behind because my life is a mess, I can usually cover things up.

Tricks to covering things up at work are the same tricks you learn in sixth grade: Prepare for a test. Do the reading for the teacher you love. Everything else can wait — you can fake it and catch up later. This is how we buy ourselves time at work to deal with our messy life at home.

Your mess changes, depending where you are in life. In my early twenties my mess was usually something like staying up all night with a new boyfriend. I could fix it by calling in sick. When I had my own company my mess was when I had crises of confidence. The moments when I was scared we wouldn’t get the next round of funding, I hid in conferences rooms and at long lunches so my employees wouldn’t see me worried.

These days my mess is usually my kids. I am fortunate to have a job with loose demands, so disappearing when I have a kid problem typically went unnoticed. Until I started blogging.

With a blog, everyone can tell when you’re not there. And this week, I went four days without a post, which is an obvious sign that things in my life are not running smoothly.

Not that I wasn’t at my computer. I had time to read the statistics about how often you should post and what time of the day. And I had time to obsessively track my Technorati statistics and notice the unfortunate truth that if you don’t post, no one links to you.

Robert Scoble says not to blog when things aren’t going well. I wish I could find this link. But I can’t. So just trust me. He says it. And he is probably right because our mood does affect the way to write. But how can I tell people how to get through a messy spot if I am not struggling to do it myself?

I will now contradict Scoble and say that the first thing about having a personal mess infect your workplace is to come clean. No one wants to hear the sordid details of your life. But by the same token, people need to hear something to explain your inconsistency — otherwise they think you don’t even realize you have a problem.

Here’s my deal: I messed up the school situation for my son when we moved to Madison. I made some bad choices, I didn’t monitor things well. This would be time consuming enough, but I am also taking time to lay guilt trips on myself, and the more creative you are with laying guilt on yourself, the more time it sucks up.

So how do I get out of a mess? First I pretend I am explaining to someone how I got in this mess. If I look at it from an outsider’s perspective I can usually see how to get out. It’s so much easier to see our problems through someone else’s eyes.

Then I go through my to do list, which is always a mess when my life is a mess. I find the number-one item on the list and do it. Last night that item was to deal with my agent. (Sample email: “Will you just write the fcking paragraph and send it to me!”) Today, it’s blogging. (Sample email: “Sweetie. I didn’t get anything this week. Did your blog feed thingy break? Love, Mom”)

The bottom line is that when your life gets messy and you fall behind at work, the only way to dig yourself out is to sit down at your desk and stop looking at the big picture — that your personal mess created a work mess. Sit down at your desk and figure out what needs to get done, and do what is the number one priority. Then do number two. And so on.

Chop wood. Carry water. Post to the blog.

Just because you’re adamant about making sure you have a personal life doesn't mean you can't be top in your field. Top is different today than it was even ten years ago. Top doesn't mean climbing a ladder to make the most money. Top means having influence in discussions that matter to you, and having interesting problems to solve.

How do you get that? One way is by making a move when you can't get any further on the path you're going. A good example of this is Billy Cunningham, medical professor at UCLA. He made a name for himself by documenting that upper-middle-class people of color in the United States were 37 percent more likely to have poor health than upper-middle-class whites, and by making revolutionary recommendations in front of Congress like dispensing medical information in church. His recommendations worked. But then he was faced with the question of what to do next.

“I thought about what is coming down the pipe where we might see the same disparities and can anticipate it and prevent those gaps from occurring. I also thought about what I could be the first to study. I started focusing on adherence to AIDS cocktails and then I realized I was late to the game because several others had started working on it before I did and they had laboratory expertise that I didn’t which would make it hard for me to compete.”

The topic he settled on was the AIDS vaccine. He was in a position to study ways to distribute it and to put himself in a position to be a key member of the community that launches the vaccine (when it is discovered) in South Africa, where the infection rate is as high as 50% in some populations.

Cunningham knows he wants to bring better medical treatement to minorities, but he knows the best way to make a difference is being the top in his field. He consciously plots to find a space that is open for him to rise to the top. You should be doing this too, in your career. This is how you have the most influence to ask important questions, seek meaningful answers, and make a difference in peoples’ lives.

Another good example of making a move is Alex Ohanian and Steve Huffman, who just sold their company, Reddit, to Conde Nast. When I interviewed them last February, they had received a buyout offer from Google, but they turned it down. At that point, Reddit was on an exciting and seemingly limitless path. Today, though, Reddit’s path as a stand alone company might be a dead end because Digg, their competitor, is now an industry standard, and Reddit is second fiddle. Taking the buyout offer now, from a premier publishing company with enthusiasm for building out Reddit, makes good sense for Ohanian and Huffman. After all, Ohanian told me, “We do this because it is fun and interesting.”

Before we get to my list of ways to decrease stress, I want to debunk some myths.

First of all, stress at the workplace does not always cause unhappiness. Your workplace happiness hinges more on whether or not you like your work than on whether or not your work is stressful, according to Alan Krueger, professor at Princeton University.

That said, declaring that you thrive under stress is a delusional justification for procrastination. Sure, there are people who can’t figure out how to deliver on anything until the last minute. But this is a crisis in confidence (fear of starting for fear of failing) as opposed to stunning brilliance unlocked by stress.

And let’s get something straight about bringing pets to work. Employees love a dog at the office, but there is not evidence that dogs at work decrease stress. There is only evidence that they make people work longer hours at the office. So maybe life would get less stressful for dog lovers if you leave the pets at home, work fewer hours and get a social life.

Here’s why decreasing stress matters to me: People who are less stressed exude more confidence than people who are more stressed. I do everything in my life better when I am feeling more self-confident, and I bet you do, too. So, in an effort to buoy self-confidence, here’s a list of things that will decrease stress at work:

1. Do yoga. In the bathroom.
Of course, doing yoga anywhere is a good idea. But during the workday, tension builds up every hour, and you can’t do real yoga in your cube without calling attention to yourself for being eccentric. So go in the bathroom and do some downward dogs. A few in the middle of the day can relax your body clear your mind and keep productivity and creativity at higher levels. (Hands on the bathroom floor? I’ve been doing it for years and haven’t gotten any diseases. That’s what the soap is for.)

2. Make a friend.
If you have a friend you can depend on at work, you will have less stress and more happiness on the job. If you have trouble making friends, researchers say you should put a plant and some candy on your desk.

Please, I do not want to see one single person commenting on how “young people today text message so much and don’t know how to have relationships.” It’s the baby boomers who have spawned a whole industry about how to make friends, how to control your ego, how to make conversation. Generation Y is already great at doing stuff like that .

3. Fill your downtime carefully.
Running errands during lunch increases stress because you worry about getting back to work in time, according to Dorothy James, professor at Texas A&M University. And if you work at home, beware: People who spend their unscheduled time slots doing housework have greater number of health problems than those who pass the time socializing or exercising, according to the Journal of Occupational Health (in an article I can’t find, but was cited in Self magazine.)

4. Fix your ergonomics.
If your body is a pretzel at a computer your mind starts pretzeling as well, to cope with the physical pain. So, wouldn’t you know it, Google has its own, in-house ergonomics expert to make sure people take care of this stress. If you don’t have a personal ergonomics guru, an easy thing to do is to make sure you use a mouse instead of a touchpad whenever you can. A more difficult thing is to learn to use one of these keyboards that manage to look like they will break your wrists while promising to preserve them.

5. Monitor yourself.
Like everything you might want to change about your life, the more closely you monitor it, the more you’re likely to make the change. So you can gauge how stressed you are by taking this test.

To be honest, though, I didn’t take it myself. Most of the problem behaviors — like “do you set unrealistic deadlines for yourself?” and “do you find yourself overeating?” — were actually integral to my getting this post written.