I'm a veteran ENFP warrior who spent 6 years fighting the Dragons of the modern post-secondary education system.
When it came to exams and hardcore studying I ALWAYS created myself a reward for the end of the day, after a long day of studying. Usually I'd stock the fridge with some cool micro-brews I never tasted, and would allow myself one + watching a movie (films being my ultimate passion).
Usually after exam time there's a break in school right? I'd promise myself a big reward then.
Eventually all things will pass, remember that. To me school wasn't usually a joy, but a necessary evil. I don't want to sit at a desk, shoulders forward, set-times, listen up, paper/midterm/final. But school is a ticket that SHOULD allow you to DO. To DO whatever it is your passion is. So to me, I kept that as the penultimate goal, above all.