Should I eat something before my appointment?
Yes, a light meal will keep you from passing out, but you don’t want to be too full. Avoid rich foods and high caloric meals.
What about drinking?
Definitely don’t get your booze on before the spa. For one thing, you’ll get too dehydrated, and you probably won’t fully appreciate the experience since alcohol drains energy. Stick with water, but not so much that you keep running to the bathroom.