This site's motto is simple: "One day, one deal.' Every day at midnight, a new item (ranging from electronics to foam mattresses and toys) goes on sale. You only have 24 hours to make your purchase, and if the "I want one!" button is bouncing around the page, the item is about to sell out. Even though you're already getting a fantastic deal, when you enter a promo code at checkout you'll get an even bigger deal.