Tournament Brackets

I fill out tournament brackets for the NCAA men's tournament with my brother, Kaarrrl, my Dad and his wife, and some friends. I am completely ignorant about men's basketball. I just lost about 90 minutes reading all about the match-ups only to be sure I am crazy for picking the upsets I did. So any GOOD advice (I am looking at you Limpy - don't mess with me) would be much appreciated.