Many amateurs take too much sand from greenside bunkers, shoving their sand wedge deep into the sand. A fat sand shot, they’ve no doubt learned, is better than thinning it 40 yards over the green. The problem is not typically a matter of tactic (who has trouble hitting a shot fat on purpose?), but of setup.
The key to using the bounce that God (or Titleist, Cleveland, Ping, etc.) gave you is setting up left of the hole (for righties), aiming the clubface at the hole or slightly right, and then taking your grip. Opening the face of the club increases the bounce on your wedge. You can still slam the club down into the sand pretty hard, but with the increased bounce, it should exit the sand a little easier.