I did the following before my pre op officially started:
1. Found a brand of Protein Shakes i liked-my recommendation is Premier Protein. The chocolate Peanut Butter is amazing
2. Found a Water bottle that i liked and had markings as to how much i needed to drink each hour
3. Practiced sipping water instead of gulping
4. Stocked up on sugar free popsicles. Jello, Gatorade zero flavors that i like
5. Practiced chewing food