Stick with what you've been doing so far. Don't start trying to eat breakfast before the race if you've done all your long runs without it.
However, after the race, you might want to start trying eating a small breakfast a couple of hours before running, and see if it makes any difference to your running, because it might well do.
Just don't try it all of a sudden on race day.
Drink plenty of fluids the day before the race to make sure you're hydrated to start with. Do what you've been doing for hydration during the race.
Edited: 05/10/2012 at 16:49