My method is similar to @ucpete's first 2 steps. Granted, it's far less effective, and that's why I've only got 2 (maybe 3) wins under my belt. Hell, one of my wins has big asterisk next to it.

Haha, basically, if I don't know the jam right out of the gate, I'm toast. When I think I have a half way decent hunch, I throw it out there. I'm still salty I lost the round that was the 10/29/98 reba. I know that jam backwards and forwards. I went out to walk the dog, listen to it, and confirm it. When I got back, someone had already nailed it.