In order to become proficient at Rummy Grand, a player must learn when to give up & when to keep going. This will improve their chances of winning. Using Strategy to Gathertype of slots Cards. In order to improve their chances of creating sets and runs, players should try to gather cards that are similar in rank and suit. To further aid in choosing which cards to keep and which to discard, it is imperative that they maintain a record of the cards that have been picked up and discarded by both themselves and their opponents.