In certain cases, breaking up a less promising meld can give you more room in your hand for combinations that are more advantageous. Also, think about the best time to lay down yourrummy cash games melds. Even though it could be tempting to share your finished sets & runs as soon as possible, doing so too soon can give your opponents a sneak peek at your approach and possibly enable them to successfully counter it. One way to add surprise and keep your opponents guessing about what you might be holding is to hold onto some melds until later in the game.