Just eat "healthy." If you're not sure what healthy foods are, then you have a lot more to learn than what we can tell you here.
If you are serious about racing, you have to eat very well. Well, I do anyway. Diet does make a huge difference for me. Concentrate on what you eat right after training to start with - recovery drink, some protein, sugars, etc.
No greasy food, no ice cream, no cake, no excessive sugars at all, take supplements, ZERO high-fructose corn syrup, and very little processed food are good guidelines. Eat like a hippie.
Of course nobody can really eat like this all the time, but it's a good goal to have. I haven't had ice cream since last spring, I have fruit for dessert, and I never eat anything processed. It's not too hard if you're a decent cook, and you begin to realize that you don't need any of that stuff.
As for race food, pre and post, do some research and figure out what works for you.
Last edited by ZeCanon; 09-13-07 at 07:45 AM.