Although we don't agree on baseball, I agree with 6Bmike on the Flying Wedges. It is your key to educated hands.
Put you mind in your hands:
Learn lag pressure (the heavy wet mop), the difference between the clubhead motion and the clubface motion (2-P), deliver the whole club with the wedges, not just the clubhead to the ball, all on plane tracing. Once you got it, you won't have to practice so much (notice I didn't say at all).