i think i have a problem with my energy levels. i work full time at a job that requires alot of energy. keeping my job depends on my production. i know i get enough sleep b/c i work at night and then i sleep anywhere from 9-12 hrs during the day. but when i'm at work i just feel shit...i hardly ever feel energetic. on top of that school started today...so that'll probably make it worse. i'll be working 5 nights a week and going to school 3 days a week. what can i do to raise my energy level for work???