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
Use an open faced 8 iron and blast it out like a normal sand shot
Put your body in the perfect position so that you may swing the club correctly