Go to the rooftop and get some fresh air while listening to some good music.
If possible, take a nap to get regain some energy.
Drinking some cup of coffee would be nice too! :)
I am actually not a healthy eater. I usually eat whatever is available.
But I exercise a lot, which is in form of sports that's why I am fit.
I do badminton, a bit of swimming, and jogging whenever I could. :)