Second, combine your foods properly. From noon until evening, the remainder of your meals should be small and combined in a way that will not interfere with digestion.

Our stomachs produce different acids depending on what food is present to digest both acid and alkaline foods. Therefore, when we combine an acid food with an alkaline food in the same meal or very close together, the acids neutralize each other, the food sits in the stomach for hours upon hours, digesting poorly and passing through the digestive tract without the needed food breakdown for proper nutrient absorption.

According to Harvey Diamond, there are basically two categories of foods that need to be combined properly: 1) complex foods - proteins such as meat, poultry, fish, eggs and dairy, and starches such as bread, pasta, potatoes and all grains. And 2) simple foods such as veggies and salads.

What you don't want to do is have two different complex foods at the same meal (proteins and starches), but rather have a complex food (either a protein or a starch) with a simple food (vegetables and salad).

One last thing, you can eat fruit anytime you want during the day as long as it's eaten by itself and at least 3 hours away from any other types of foods.

That's it! Following those simple rules of fruit until noon and proper food combining is a very easy and effective method of increasing energy, allowing your body to cleanse itself and increasing your digestive capabilities substantially! 

I could write volumes regarding the physiology and reasoning behind this eating philosophy, but hopefully I've given you enough information to peak your interest and cause you to experiment a little.