2. Package Deliveries from Gift Shops
As you make your way around Disney World, you'll find yourself tempted to buy every knick-knack and piece of memorabilia that catches your eye. After a while though, it becomes difficult to carry all that stuff around while you're trying to go on rides and such.
Luckily, Disney World allows resort hotel guests to have those souvenirs delivered to their hotel's gift shop for next-day pickup, free of charge. Just ask the clerk about it at checkout and they'll set everything up for you.