Here's an idea: Instead of thinking of your summer vacation as something that detracts from your work, think of it as a way to boost your work performance — or even your business.

The weeklong getaways that run a day or two over, the hour-long siestas that turn into three hours, and the three-day weekends that go on for four can all help your career. You just have to use the time well to take care of your physical and mental health.

Why? A healthy body makes for a healthy, balanced mind, and that's the chief asset of a truly good worker. It's not about the hours you spend behind a desk – it's about what's going through your head while you're there.

Here are four ways to ensure that your summer fun in the sun enhances your career success, whether you're still on vacation or are back from one:

1. Go for a run in the park, or swim in a lake at sunset.
It used to be that working out was optional. Now we know that regular exercise makes you calmer, smarter, happier, and richer. So how can you possibly say that it's not one of your highest priorities?

It makes sense that if you feel better about yourself and the world you'll do better in business. Because business is about thinking clearly, acting with confidence, and making good connections.

But don't work out just because people who work out make more money. Do it because it'll change your outlook on life. Really. You'll be less likely to be depressed and more likely to be optimistic.

If you're younger, join an athletic team. People who play sports do better in their careers. This is true whether you're on a small liberal arts college fencing team or a Big Ten football squad. The self-confidence, teamwork, and drive that athletes display makes them higher performers at work.

Sure, there are exceptions, but the advantage is so pronounced that some corporate recruiters at colleges ask to see only the athletes.

2. Mentor a summer intern.
Each of us needs mentors to guide us through our careers at different points in time. Sometimes we need help navigating office politics, sometimes we need advice on making a life change. At each point, knowing how to ask for help is essential, and the best way to learn how to ask for help is to give help.

If you mentor someone, you help yourself as well. You'll find out what a mentoring relationship is like from the other side. For example, you'll learn what feels useful to the mentor and what's annoying. You'll also discover why it's important to ask good questions, because as a mentor you're helpless if the person you're trying to help doesn't know what he wants.

Summer interns are ripe for this task. They're there because they want to learn. You can teach them not only about the workplace but about themselves, and how to figure out where they fit. You can be an advisor and a coach and a friend. These are all great ways to mentor, and after the experience you'll have more confidence in seeking a mentor of your own.

Read the rest at Yahoo Finance