One good tactic is to keep a close eye on the cards your opponents are discarding. Players can learn a great deal about their opponents' hands and posrummy 40 bonus app listsible strategies by watching which cards they decide to keep or discard. Players can use this information to decide which cards to draw or discard, preventing their opponents from finishing their runs or sets. In Color Rummy, skillfully controlling one's own hand is a crucial component of strategy.