You can make well-informed decisions about which cards to keep or discard by keeping an eye on the cards that are thrown away. Modifying Your Approach. You may be able to modify your strategy if you observe that arummy bossn opponent is not pursuing a high-point hand if they have discarded multiple high-ranking cards. Knowing which cards are still in play can also help you decide which ones to keep and which to discard, which will ultimately improve your chances of winning. For rummy to be successful, it is essential to recognize patterns and sequences. While drawing and discarding cards, players should cultivate an eye for possible melds.