I don't use facebook to stay in touch with family. I need to get in touch with a family member? I call them. For me, facebook is good for staying in touch with all my friends from middle school, college, acting classes, etc. It's just a nice way to stay connected. As for twitter, I do have one. However, whereas on facebook I'll do dull statuses like "I'm reading so-and-so book", I usually go to Twitter when I have more interesting/humorous things to say.