Here are a few tips to help you enjoy the service and not worry about interfering with your ability to land that perfect job.

The bottom line: A little Facebook savvy goes a long way.

First, understand that Facebook isn't private. Yes, you can choose your friends and to some degree limit what people see about your posts, but plenty of interested parties actually have a window into what you're sharing. For one thing, the social network keeps track of everything you do on its territory so as to push hyper-targeted ads to you.

Timeline, for example, has been for communicating too much about users because it visually aggregates everything you've ever done on the site -- the information you've included on your profile, your photos, everything you've ever "liked," any Facebook apps you're using, a map showing where you've been (according to geo-tagged posts and photos), as well as a timeline of everything you've ever posted.

And by encouraging people to create an online scrapbook and add to Timeline extra information about their lives -- all the way back to birth if they want -- Facebook gleans even more personal data about its users. The point is to deliver ads that users are more likely to click on.