Props aside, you should take some time to practice slow flight up high. Try to fly as slowly as you can and maintain level flight. Then slow a bit more and do slow decents. I don't know that y our landing approach technique has anything to do with your problem, but who knows, you might find you can slow the cub better once you get a better feel for what it does nearer to stall speed.

MinnFlyer's and Unstable's advice is good too. And if you get the hang of slipping, you can really "wow" em at the field. (few guys at most fields can slip in a landing in a controlled way).