Studying the opposition to improve strategy. It can reveal important information about an opponent's tactics and intentions to watch which cards they are picking up or discarrummy goodding. For instance, it might be a sign that an opponent is trying to finish a run or set in a particular suit or rank if they routinely remove cards from the discard pile that belong to that suit or rank. Players can improve their strategy & raise their chances of winning at Rummy by fusing personal card counting with astute opponent observation.