On difficult greens create a red light, yellow light and green light section and play your shot according to the risk involved
When playing a bunker shot play the ball off your front heel and make sure that you hit only several inches behind the ball so that the bottom of your swing arc is directly under the ball
The arms work very differently in the swing, with the left arm staying straight up to the release and the right arm bending early, use this two club drill to get the feel of the proper motion of the arms working together