A well-managed hand should ideally be made up of cards that can form multiple melds and complement one another. For instance, it could be advantageous to concentrate on maksataakiging runs rather than sets if you have multiple cards in a single suit. Also, monitoring which cards have been thrown out can reveal important details about what is still in play. By using this information, you can decide which cards to keep or discard depending on what might be left in the draw pile or what your opponents might be gathering.
