1) Sub-categorize your friends list.
2) Remove yourself from Facebook search results.
3) Remove yourself from Google search results.
4) Modify who can see tagged videos or photos of yourself.
5) Customize who can see all your photo albums, or even just specific albums.
6) Prevent personal stories from showing up in your friend's news feeds.
7) Monitor published application stories in your news feed.
8) Keep your contact information private to only those in your network.
9) Control who can post on your wall, and who can read your wall.
10) Keep your network of friends private.
Read about each setting in greater detail here:
http://kiwicommons.com/2009/05/facebook-privacy-settings-by-allface...