You can predict which cards you might need to finish your sets and runs by keeping track of which cards have been discarded & which are still in play. Observing your opponent's movements & attempting to prevent them from finishing their rummysets and runs is another crucial tactic. This can be achieved by purposefully discarding cards that are unlikely to assist your opponents or by holding onto cards that you know they need. To increase your chances of being "Rummy Perfect," it's crucial to manage your hand skillfully in addition to creating sets and runs. This is trying to maintain the best possible organization in your hand so you can quickly determine which cards you need to finish your sets and runs.