Players can get a big advantage in rummy gameplay & improve their chances of winning by becoming experts at creating and breaking melds. Recognizing Card Preferences. One of thsatta.king resulte most crucial skills in rummy that can give you a big advantage over your opponents is reading their movements and predicting them. Observing carefully at which cards opponents pick up and discard, as well as the melds they are forming, can provide players with important information about their opponents' tactics and help them modify their own play.