Breakfast is one of the two most important meals of the day. Period. The other one is your post-workout meal. In other words, it's what you eat after the gym. But let's concentrate on breakfast, because so few people seem to get it.
Don't show up to class without first eating breakfast. It's just utterly ridiculous to get to class on an empty tank. You slept about eight hours, and you haven't eaten for at least that long. Now you're going to add a few more hours on top of that without food? Eat breakfast.
When I tell my guys to eat breakfast, they make it sound like they don't have a clue what I'm talking about. People! It's not rocket science! Here's what I'm eating while I write this: a bowl of oatmeal, two eggs, a glass of orange juice, a glass of water, a banana, and whole wheat toast. And I will admit, I'm on my second cup of coffee. I don't recommend the coffee, but that's just the way it is.
Have a bowl of cereal with skim milk. An egg or two, however you like them. (And if you don't like them, start liking them. And forget about all that nonsense of not eating anything but the whites. Crack some eggs and get to it. Yoke and all). Have some fruit juice. REAL fruit juice. If you don't want the cereal with milk, eat oatmeal. I recommend that over the other anyway. And get creative. Don't force yourself to eat the same thing day in and day out.
Eat breakfast. Quit being a complete idiot and eat.