A more subtle faux pas can affect your online reputation and even future job path, as your friend list on Facebook includes both personal and professional contacts. Information you post can mess up your work relationships and personal ones in one quick swoop.

For example, the immediacy and ease with which you can post a quip on Facebook may get you into trouble if you're teasing your significant other — plus tell work colleagues more than they need or want to know about your relationship. This recent story of a man caught cheating by his wife when she perused his iPhone got us thinking: In this day of gadgetry and near-constant contact via social networking, how can you avoid blunders that will deem you a thoughtless spouse, friend or colleague?

Kirsten Dixson, a reputation management and online identity expert, has some tips to keep you on the appropriate social networking etiquette path. Because Facebook mixes your personal and professional life, she says it requires more careful attention than LinkedIn, the social network for professionals, which keeps a strictly all-business look and feel due to its design.

Here are Dixson's suggestions for managing your Facebook profile and your overall social networking persona, and warnings about places where you can get into trouble with people who matter to you personally and professionally.

1. Choosing your profile picture

Thoughtful: Some people militantly believe that Facebook is all personal while LinkedIn is all professional. If this sounds like you, you might choose a Facebook pic of yourself fishing, hanging out at a party or playing a guitar. But Dixson says you're better off to err on the side of caution here, by keeping your profile picture professional, or at least neutral. Your photo doesn't need to be in a studio with a boring canvas backdrop — it could be outside on your deck or on a mountain side, for instance — but it has to be fairly even-keeled. (This is different than LinkedIn, where photos should be strictly professional, Dixson says).