[stormpat]

TLDR. Keep an healthy diet, and exercise. Sleep enough.

Im lucky to have a gym 10 meters from our office, so 3 times a week i use my lunch ti go to the gym, and eat afterwards something light at the office, i try to go jogging twice a week on to of the gym.

Try to eat a fiber rich diet, if you choose to exercise. And never pass breakfast. Its important, the most important meal of the day.

Now for the mental part, here the most important thing is to sleep. Dont watch TV, read a book instead.