Get to sleep. That's the last advice I can give ya.
Tomorrow, eat a higher carb breakfast, like a couple of bagals and some whole grain cereal and some juice (100% juice, not the nasty stuff). Then give it an hour or so to digest before you get to the race.
Be sure to give yourself a good warm up. It's a short race, so give yourself 45 min to an hour to warm up. You want to get your heart rate through all the different zones- which means you'll take your heart rate from a low of about 60% heart rate max to a high of about 90% heart rate max in the last few minutes of the warm up. Warm up in the shade on an indoor trainer, and drink lots of water so you aren't dehydrated for your race.
Finally, carry a few packets of Gu. For the final few minutes, you'll need that sudden spike for the extra energy for the big sprint.
Get to bed!