I started taking private lessons recently, and my instructor has been revamping my game to make basically every shot heavy topspin. Basically, the levels are numbered Deltoid 1, 2, 3, and at each level, you go farther with your followthrough till you get the complete stroke. I've really improved my forehand, but my backhand needs some polishing. He has me stick my elbow out really far in the preparation and the whole stroke. Its dead annoying, but (un)fortunately, it works.