It used to be that authority only came after years of experience. Even then, someone older had to anoint you before you could begin spouting your opinions and advice from a place of authority.

For instance, I climbed the corporate ladder very fast when I was in my 20s, and had a hard time maintaining my authority among people older than me. So my boss became convinced that I needed a coach in order to acquire the trappings of established authority.

The coaching was only moderately successful. But I did learn that authority has a lot to do with having self-confidence in your strengths, and little to do with other peoples' preconceptions about you.

Today the Internet democratizes authority, and people are judged not by their age or experience but by the quality of what they have to say.

This is great for 20-somethings, especially those who give advice about or discuss their own careers online. As Marci Alboher pointed out in the New York Times, "it's all about figuring out what you can bring to the table that others cannot." In the case of young bloggers, their tips and opinions are quirky, fresh, and interesting, even if you don't always agree with them.

Online, much more so than in print, authority is about voice. Can you tell that a real person is behind the ideas? Do you feel like you know him or her? A strong voice is more engaging, and once you're engaged with someone you're more willing to listen to her whether or not you agree. In this way, voice begets authority.

With that in mind, here's a selection of 20-something bloggers I find irresistible, both in the intelligence of their ideas and the temerity it takes to post them. Most of them write about careers either directly or tangentially, and all of them give people a new way to look at issues we face every day.

Read the rest of the column at Yahoo Finance.