For those of us in reasonably good health (free of any serious illness such
as diabetes, heart disease, etc.), one of the most important things that we
look for is a diet that will help us maintain a high level of energy (not
to say that I'm unconcerned about overall healthiness, only that I don't
have to deal with any particular sickness-related issues).

What components of a diet contribute to an increased energy level?
Personally, I try to eat a big breakfast (5 eggs or fewer eggs with some
meat, fruit or potato), lunch and dinner (both filled with meat/fish,
veggies, and fat), with a fruit and nut snack in the afternoon.  I eat
leaner meats and my Carb-Pro-Fat breakdown is about 20-30-50.

How signficant is the glycemic index, and will ea

ting a sugary piece of
fruit make you drowsier than eating, say, lentils?  What about a very low-
carb approach?  Is this sustainable over a lifetime?  I've heard that
saturated fats in particular provide quite a boost of energy - would this
be a valid argument for eating full-fat dairy products for those who have
no allergy to them?

How many protein meals do you have per day?  How about combining the
different macronutrient groups?