How long have you been taking Geodon? A month, right? It took me like 3 months before it stopped sedating me hardcore. I used to only take it at night, because I found the AM dose to be too sedating, though. My doctor just switched me back to an AM dose, though, and it's hard to adjust. I think your 7 AM and 10 PM plan should work for you. You don't typically have hallucinations in the afternoon, right? They're mostly at night and in the morning? And if it doesn't work for you, you can always start taking the PM dose earlier.
Now that I have to wake up and eat 500 calories almost immediately, it helps me to have the food prepared the night before. That way, I don't have to stumble around the kitchen half awake. Peanut butter and mixed nuts are really high-calorie foods, and they make it easier to get to 500 without feeling overly full.