I generally have about an hour from wake up to leave for my hour+ commute and in that time I have about 2 cups of coffee (on a good day) as my pre-ride prep. After biking to work, I eat an english muffin with some cream cheese, a yogurt, and more coffee (I'm a scientist and we're contracturally obligated to drink as much coffee as possible). I then snack on power bars, Baker's breakfast cookies, or frozen yogurt through the rest of the morning and later in the afternoon (plus as much water as possible). I pretty much always try to have a snack (something quasi-healthy like a power bar or the like) about an hour before biking home. That seems to work in that I'm not a total crank when I get to the house (from hunger, stupid drivers are another issue).

I'll have to try the 50/50 OJ/water thing tomorrow...