As you're likely to be spending a fair amount of your time dressed in just slippers and a robe, you won't need to bring a lot. Besides casual clothes to slip on after your relaxing spa treatments, essentials such as underwear and a toothbrush should be on your packing list. Of course, if you intend to make use of the swimming pool or join a couple of exercise sessions, squeeze a swimming suit and some workout clothes into your bag too. Finally, leave the smartphone and laptop at home and take a good read instead. It is a relaxation escape, after all.