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
Do not make tough bunker shots harder than they already are, when faced with a deep bunker with high lips play your stance and clubface square and let the loft of the sand wedge pop the ball up or just play the ball to a lower part of the bunker lip
Practice on an uphill lie to get your set up position back to center and your weight off your front leg