FATIGUE--Often, raising seratonin can help. Supplement SAM-e, S-adenosylmethionine, is a compound formed naturally in the body from the essential amino acid methionine and adenosine triphosphate (ATP), the energy-producing compound found in all body cells. It was first discovered in 1953. It raises seratonin and dopamine.

Also, Maca (South American herb) can give a big 4 hour boost to your energy, when you have to perform. Sometimes you might experience a slight energy crash at the end of the 4 hours.