The best way to provide your body with more energy would be to consume foods that have a rich source of energy.  Foods that naturally provide the body with energy include banana, spinach, citrus fruits like grapefruits and oranges, apples, almonds and lemons.  Green Tea and Yerba Mate tea is also a good source of energy.  Camomille or Kava Kava tea can help calm you when you're ready for bed.  If your schedule constantly flucuates, you might be interested in the Energy Formula. 

Energy Formula