Create perfect distance control on your short iron scoring shots by using a less lofted club with a shorter swing and less wrist action, like Tiger does
Focus on your left wrist at the top of the backswing and start of the downswing to get to impact properly, many players have a cupped left wrist which changes the angle of the clubface, this causes an open clubface and results in casting and manipulation during the last portion of the downswing
Practice on an uphill lie to get your set up position back to center and your weight off your front leg