"Energy is the ability, when a physical system has to do work on other physical systems." So, forget the coffee. Maybe it re-feels your emptyness, but gives no abilities. Vitamins? They keep the motor working properly, but I bet you won't get any necessary skils. What to do then? Maybe look at aeolics and move yourself. Slowly and persistently. Purely and naturally. Be patient and stop when is necesary. The Wind of Change never fails.
"The more you lose yourself in something bigger than yourself, the more energy you will have." (Norman Vincent Peale)