Making informed decisions about which cards to keep can be achieved by keeping track of which cards have been discarded & which are still in play. For example, if you have multiple cards that could form differummy 51 bonus listrent sets or sequences, think about which combination would score the most while simultaneously monitoring the possible moves of your opponents. When choosing whether to keep a card that has the potential to finish a sequence or toss it in favor of another option, this insight can be very important. Determining when to split possible melds for a bigger strategic advantage is another part of optimizing your hand.