You woke up at 4AM and you cannot sleep, so what you gonna do? Other than watching the Astro and hoping you can fall back to sleep or just stand up and do some exercise. Yes, exercise. You heard me correct. Start your exercise as early as possible.

If you are not interested to try my latest recommendation here, you can try this exercise I posted long time ago: Sleepy or Stress relieve exercise! Yes go ahead, click that if you have not seen it. Trust me, you can just lose 100grams just by watching it. Guaranteed!