The best place to store playing cards is in a cool and dry area, whether it's a game closet, cupboard, or drawer. Basements, attics, and other spaces prone to condensation aren't ideal, as the moisture could damage the material. Cards will come in an outer box often covered by cellophane. "You want a box that won't just wear out as soon as you start using the deck," says Kalush. According to him, the best way to do this is to keep the cellophane wrap on your cards until you are ready to use them to avoid any humidity coming through.