Here's some good stuff from FanGraph.com...
1. Never put the tying or go-ahead run on base.
2. Play for the tie at home, go for the victory on the road.
3. Don’t hit and run with an 0-2 count.
4. Don’t play the infield in early in the game.
5. Never make the first or third out at third.
6. Never steal when you’re two or more runs down.
COMPLETE LIST & ANALYSIS