Making informed choices about which cards to remove from your hand while taking into account both your own and your opponents' needs is known as "wise discardinglucky rummy star.". Discarding valuable cards without considering whether they might aid an opponent in finishing their melds or runs is a frequent error. If you discard a 7 of hearts, for instance, knowing that your opponent has already collected multiple hearts, you might unintentionally give them the last piece they require to win.