things you need for the hospital:
toothbrush, paste , floss
pillow to hold tummy on ride home
comfy, loose clothes for the ride home
slip on shoes
phone and charger
chapstick
books, magazines, iPad
deodorant and powder
Stuff I have on hand for my first two weeks post -op at home are:
sugar free Jello
sugar free popsicles
broths (chicken, beef, veggie)
Many different flavors of Crystal light and Sugar Free Hawaiian punch
Clear protein drinks--Isopure, unjury unflavored, Syntrax Nectar Fuzzy Navel and Twisted Cherry.
Extra strength Gas-X
Celebrate Bariatric vitamins (multivit, calcium, B12, Iron)
Second Stage or "Full liquids" weeks 2-4
strained soups (cream of mushroom, cream of chicken, cream of celery, tomato bisque)
Milk based protein shake mixes like Syntrax Matrix Strawberry Cream and EAS vanilla
Skim milk or soy milk
Hope this helps! I'm sure you will get more info at your pre-op appointments. Every doc has different guidelines as far as what they want you to eat when.