Discarding less valuable cards that are unlikely to support an opponent's strategy is usually preferable if you have reason to believe that a certain card could help them finish types of ssd slotstheir melds. The secret to mastering Rummy is finding the right balance between keeping valuable cards and discarding ones that are no longer useful. In Rummy, wild cards and jokers are strong tools that, when used properly, can greatly increase your winnings. They are extremely versatile cards that can be used to form melds in place of any other card.