Facebook is my guilty pleasure. It's useful for sharing information without having to contact everyone individually and accidentally miss someone, but on the flipside, if you forgot so-and-so could see your facebook, it could lead to disaster. -_-

My main use for it is keeping in contact with family and friends so they can see how i'm doing and vice versa. For my friends who live farther away and can't visit me, they'll be able to see pictures of my wedding and my little guy after he arrives.