I IMDB. Can't imagine how I lived without it for so long.
I found this cool book on character actors for Bears christmas. "HEY! It's That Guy! The Fametracker.com guide to Character Actors" by Tara Ariano and Adam Sternberg. It got all bent up from people looking at it, I had to buy him a new one. I've given about 4 others as gifts since then.
I even got myself a copy so I could have it signed at some of the conventions I go to!