Using cunning to select cards from the discard or draw piles is another technique to trick your opponents. This confuses your opponents about the combinations you're satta.king comattempting to form and keeps them guessing about how you play. Keeping a Straight Face. When playing rummy, it's important to pay attention to your facial expressions and body language. You can trick your opponents even more and win the game by keeping your composure and refusing to reveal any information about the cards you hold.