Ya Burn Baby Burn is right, breakfast should be the largest meal of your day, and your eating habits should look like a pyramid, with dinner being the smallest believe it or not. My friend will be over later tonight and she's a nutritionist, I'm sure she'll be able to give you a few tips. In fact I will make her post something for you on the board.
Now the amount of calories you consume, etc. should all be goal-based, but a good combination of starches, vitamins, minerals, carbs and fats generally will allow your body to become leaner and essentially allow your endurance to keep up.