To answer 2manybike's question, my commute is about 5 miles each way. I usually ride empty in the morning, but lately (even before posting this question) I've started having some juice, and this morning I had a bowl of cereal. I'm thinking that maybe I'll try to find a middle ground consisting of a little solid food with liquids. I can see the reasoning for not eating a lot, but I have also felt what others have said, that if I'm too hungry, I'm low on energy. I'm going to buy some granola bars this afternoon to keep in my desk drawer for late afternoon.

Thanks for all the responses!