In rummy, even experienced players can make common mistakes that impair their performance. Keeping expensive cards for an extended period of time is a common mistakmemory slotse. If an opponent goes out first, it can result in a large point loss, even though it might seem wise to hold onto these cards in the hopes of creating a set or sequence. High-value cards should usually be discarded early if they don't immediately fit into any strategy. Failing to observe opponents' discards is another error.