You can learn a lot about an opponent's tactics and goals by watching how they play. An opponent may be working toward particular melds if, for example, they routinely select particularonline bingo and slots suits or ranks from the discard pile. You can decide for yourself which cards to keep or discard by keeping an eye out for these trends. Also, observing the speed at which opponents draw from the pile can provide insight into their confidence levels; more decisive players may be on the verge of going out, while hesitant players may be having trouble with their hands.