Although card counting is a strategy frequently used in blackjack and other games, it is also very useful in rummy. Through monitoring the cards that have been used or discarded, players can learn what combinations their rivals might be putting together. Hayou know rummy gameving this knowledge enables one to make more calculated choices about which cards to keep or discard. Players may decide to keep lower-value cards that could still make helpful melds if they see, for example, that multiple high-value cards have already been discarded. Rummy players who want to count cards well should establish a methodical strategy. Using a basic tally system to keep track of important cards or mentally recording the suits and ranks of cards that have been played are two possible approaches.