Everyone has a weakness in their game or a shot they'd like to perfect. How do players go about addressing these problems? Usually in haphazard fashion. They'll either try to work on it in actual matches, or they'll work on it some in practice, along with everything else. The result is usually a little improvement, which often convinces them they are on the right track. And so they progress very slowly. But it can be done much quicker with a little "saturation training."