This is an article from PC World on how to better protect your privacy on Facebook. Seems like there is a whole lot more to know about these options than the average user knows, and they seem to introduce new ones often, sometimes it's hard to keep up. I didn't know quite how to use some of the features listed on here.

"Ignoring Facebook's privacy options--some of them fairly new and not well known--can trip up the social-networking site's users in a number of ways. Here are some that everyone who has a Facebook account should be aware of."