Focusing on creating sets & runs that sum up to seven or multiples of seven is another strategy for winning at 777 Rummy. When setting up your hand, it's critical to give thesemason slots combinations priority because they're essential for scoring points in the game. Keeping a record of the cards that have been played can also be helpful, as it can help you decide which cards to pick up and which to discard. Also, it's critical to control your hand wisely and refrain from keeping too many cards that don't make sense as combinations.