Rummy players can maximize their enjoyment & improve their chances of winning by carefully using their discards. Determining Possible Combinations. Being able to recognize rummy old apkpossible card combinations in your hand quickly is one of the key elements of creating melds in rummy. This entails being able to distinguish between runs—three or more consecutive cards of the same suit—and sets—three or four cards of the same rank—and to give priority to forming those melds in order to be eliminated. Changing Your Approach.