I've been on the liquid diet for a full week now, with another one to go. My doc requires an 800-1,000 cal low fat diet of protein drinks, sugar free drinks, and he also allows plain non-starch vegetables. 24 hours before surgery just clear liquids allowed.
I won't sugar coat it... one week in and I've wanted to claw my eyes out at times. I'm surviving it by shaking up the types of protein drinks I make and using a wide variety of sugar free Davinci or Torani syrups. Sometimes I add skim milk. Sometimes Light Silk. Sometimes just water. Click is a protein mix that has caffeine in it and tastes somewhat like coffee. I'm enjoying some right now for a warm treat.
I'm not sure if you're allowed veggies, but if so, not being able to put butter or cook them in oil was rough. I've been cooking them in broth (allowed) and seasoning the heck out of them.
I wish you luck... what is your surgery date? I'm the 17th. Excited, scared, you name it!
Edited to add:
My signature is SO wrong. It's from 2000... boy it's been awhile.