In order to determine your opponents' possible sets and runs, it's also critical to observe which cards they are discarding and picking up. This can assist you in determining when to declare "Ryono rummy slotsummy" and win the game, as well as which cards to pick up & which to discard. Handling Your Situation. Holding onto high-value cards until you can use them to form sets or runs is another crucial rummy tactic. High-value cards are tempting to discard early in the game, but it's usually a better idea to hold onto them until you have a better idea of how you can use them in your hand.