I usually take off pretty early in the morning....about 6:30. I'm not traditionally a morning person so getting up really early is a drag. I've been told in the past that eating before physical activity, without a good gap in between (2 hours) is usually not beneficial because it takes the food a while to digest and be made into energy. Plus if you bike right after eating a meal you are expending energy that your body would normally use for digestion purposes. Sometimes I eat and energy bar but I don't like eating those that much and I would actually prefer a bowl of cereal (Whole Bran) or an egg.
What's the scoop with you folks? Do you eat cereal, pound an energy bar, or just have some water and hop on the bike. Normally lately I do the latter and don't feel too much of an energy shortfall but maybe I'm missing out on my rides by not ingesting more stuff pre-ride.