OK, well going all-in for 20x the original raise is not generally a good idea. Villain doesn't have to have a good hand very often to make that a profitable situation for him. It sounds like you are playing at low limits- you shouldn't assume people are re-stealing very often. Wait until someone comes over the top of you more than once before you start calling with marginal hands. Again, it's ok to fold the best hand now and again, you only have to call correctly a few times to make up for the incorrect folds.