If you have certain photo albums you don't want people seeing, but don't feel like deleting them completely, you can hide them so only you can see them on Facebook. The same goes for events in your life, whether they be relationship changes, new jobs, or whatever.

Just take note of the little gray icon next to a photo album or post. Two little people mean that it can only be seen by your friends, a globe means it's public, and a padlock means only you can see it.