Melds are runs and sets of cards that a player forms in their hand to declare a game of rummy. The cards that your opponents are discarding can provide you with important information aboutgame dow which cards are safe to pick up & which ones to avoid, so keep an eye out for them while you're building melds. You can also find out which cards are still available in the draw pile by keeping track of the cards that have been taken from the discard pile. Since runs are frequently harder to form than sets, concentrating on them first is a crucial tip for creating melds.