For quick energy carbohydrate, concentrate on foods rich in natural sugars, particularly fruits and honey.
There is a great variety of natural sugars in the most ordinary foods. Honey is more than 50 percent energy producing glucose. It also contains B vitamins and a variety of minerals that contribute to calm, clear thinking.
Combine honey with peanut butter which is high in protein, and you have an ideal cracker spread or sandwich for energy and healthy muscles. Eating less for lunch and having a peanut butter and honey snack in the afternoon will boost your energy (mental and physical) to finish the days tasks before dinner time.
Going hiking? Peanuts and raisins!