You will then be able to decide which cards to discard and which to keep in order to create these combinations. As you don't want to give your opponents arolling slots casinon advantage by discarding cards that they need to complete their sets & runs, it's also critical to pay attention to the cards you discard. Keeping track of the cards you've already played is essential to effectively managing your hand because it helps you determine which cards are still in the draw pile.