I had a lot of lessons to help me with my reverse pivot - you are one step ahead since you already know what your problem is.

This is what has helped me - it is from a golf book. I imagine that there is a vertical line running from the center of the golf ball up to the sky. If at the top of the backswing you are totally behind that line - you are off to a good start.

Also, from my own perspective, I have deliberetly tried to slow my swing down. When I swing too fast - way too fast - I have a hard time shifting my weight over in time - I also look for that stretch I feel with a proper high finish and I check to make sure that my weight has moved forward and that very little weight is on my rear foot.

I hope this helps, good luck!

P.S. if you can get a video of your golf swing and watch yourself, it will go along way to showing you what you need NOT do. It helped me.

James