If your tendency is to do a reverse weight shift or pivot, this is an excellent drill to help learn the correct weight shift. This exercise is great for anyone that needs to learn how to load the backswing.

Simulate an uphill lie by placing your front foot on a step or bench.
Lean your weight slightly towards your back foot and hold a club or hand weight as if you were going to hit a shot.
Swing to the top and stop to make sure that your weight is loaded into your back leg. Feel the weight on the inside of the back foot and keep the back knee slightly flexed.
Rehearse your backswing for 8 to 10 repetitions.