You can learn which cards are still in play and which ones are probably available for you to pick up by keeping track of the cards that are being discarded. Also, you can learn a lot about the sets and runs that are probably going to be open for 777 slots appyou to form by keeping an eye on the cards that are being discarded. Being tactical in your decision-making regarding when to remove cards from the discard pile is another useful tactic. You can improve your chances of forming sets & runs with the cards you currently have by holding off on picking up cards from the discard pile until the right time. Also, you can keep your opponents from learning crucial information by strategically choosing which cards to remove from the discard pile.