Eat 3 hours before the half marathon? Thanks for the advice. I don't know if I will ever get up to that distance (I'll start running 10K's starting in March or April), but it's good to know that there are people at this site who have done these longer runs and are good enough to part with their knowlege of nutrition. Since I am only running 5K's now, I don't alter my eating much pre-race. I just eat bread and honey two hours before, like before training runs, and have a banana 30 minutes before the race.
To tell the truth, though, for the rare training runs when I did not eat at all before, I did not suffer any less energy or lack-of-performance. I guess the nutrition starts to play in increasingly important role in the longer races and runs.