Yes the prep stinks. Popsicles saved me. The last couple days of prep I got my hair cut and colored, got my nails done and a Pedicure. For headaches, try rubbing some peppermint oil on your temples. This sure helped me in the hospital.
It's not the greatest but let me tell you what happened with me. My stomach was growling while I was on the operating table. When I woke up, no growling yay. I'm not hungry just very very thirsty now. They say I can have something after my swallow test.