To maximize use of the bounce on the sand wedge and allow for softer landing shots, address the ball forward in your stance with your hands even with the ball, not ahead, and your weight on the left foot.
Roll and hinge the left wrist abruptly to about shoulder height (for right-handed golfers) to allow it to cup at the top of the back swing. This puts the toe of the club behind the heel. Spank the sand two to three inches behind the ball without turning the clubhead over. Practice this technique for softer shots.