I love Facebook. Definitely makes my life a lot better. I use it to:
* stay in touch with friends
* know what events are up (my group of friends create events even for very small gatherings)
* find out about new music from the artists I like
* find interesting links and news about programming/tech (from a group I follow)
* read interesting discussions about programming/tech (same group)
* see interesting posts about indie games and indie game development in general (another group)
* see what people I've long lost contact with are up to nowadays