What are /sci/ approved ways to improve your productivity/vitality and minimize fatigue?

>inb4 blog
I'm a bit envious how some of my peers can drink their brains out and take an exam the following morning while I seem to feel fatigued most of the time yet never done such things.

What are some ways to negate this low energy? To feel one's best as to be able to concentrate with ease consistently?

First ideas that come to mind is that I could start trying to have fixed sleep schedule, cutting down on consuming media (i.e. less 4chan), start doing meditation/yoga again, avoiding sugar/caffeine, stretching, and start time blocking.

Any other suggestion /sci/? what do you do to get to most of your time?

There's so many subject I wish to study if only I had the energy to do so.