Yeah, I keep a spare tube, patch kit, mini-tool, tire levers, money (including quarters), ID, insurance card, CO2 cartridges and inflator, chapstick, and a small thing of sunblock. I usually carry my phone in my jersey pocket, although I'm finding the heat and sweat is causing some problems.

One trick with gels is to tape them to your top tube to carry them. makes them easy to access. Just make sure that your knees aren't going to hit the tube or you'll end up with some nasty paper cuts.