Being aware of the Discard Pile. In Rummy 51, the discard pile is an important component that has a big influence on how you play. There are opportunitvip appies for strategic plays when a player discards a card, making it available for other players to pick up. Pay close attention to the cards your opponents are discarding and the ones they appear to be collecting in order to make efficient use of the discard pile. examining the tactics of the opposition.