Well I agree with most of the OPs that diet and rest are crucial. But one thing that I relized being a highschool student is that you're not truly awake unless youve been up for awhile and you HAVE to be in motion. I could be up for hours and still have no energy, a body in motion stays in motion. Before I lift or do intense cardio I take a small jog. Some people are also just not morning people. A supplement is helpful but they have their side effects. Before you jump to these and burn $100 on something I suggest trying to work out after a different time along with everything previously said.