Common errors that impair rummy performance can happen to even experienced players. Keeping an excessive number of high-point deadwood cards is a cocash rummy appmmon mistake. Although it could be tempting to hold onto these cards in the hopes of later forming a meld, if another player goes out first, they can greatly raise your score. Regularly reviewing your hand and being prepared to let go of high-point cards that don't help form melds are crucial.