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
Hitting the ball with the sweet spot of the putter allows the putter face to stay square and not twist
This drill is great for people stuck in an office or in bad weather, hook the right hand under the left and practice your backswing and downswing with a perfect right and left wrist position