As you'll probably spend quite a bit of your time at the hotel dressed in just slippers and a robe, you won't need to bring a lot with you. Besides comfy clothes to slip on after your relaxing spa treatments, personal items such as deodorant and a toothbrush should be right at the top of your packing list. Of course, if you intend to use the resort's swimming pool or enjoy a few exercise sessions, throw a swimming suit and some gym attire in your bag too. Finally, leave the electronics at home and bring a book instead. It is, after all, meant to be an escape from the real world.