Little "Miss", as long as you take in caffeine, of any type, you're continuously "borrowing on tomorrow's reserve". I'm guessing you stay up late at night (maybe homework); but regardless, the caffiene "helps that lateness"! Then, the next morning, I'm guessing that either at home or from the machines at school, you get a "Red Bull"? And there's one more main thing that keeps people tired (besides stress & homefront "challenges")---DIET! If you're getting a lot of foods that are high in sugar, the "downside" affect is tiredness & sluggishness! So watch out for those "Snickers Bars"! Hope that gives you some guidance.