Time Management During Excessively Busy Times

Hey guys, I'm not in IB but wanted to get some expertise from bankers on time management. 

Here's my situation:

• Just started an internship at a large tech company this week. Start date was non-negotiable. I love the company and role so I happily accepted the offer.
• I work 40 hrs/week.
• I'm currently in my junior year of my undergrad degree in business (I study in Canada). I have 3 final exams in the next 8-14 days. Luckily they are all 2 days apart
• I've went to class the whole semester but obviously these are final exams so I've got a lot of studying to do.
• I have pretty good time management skills. Former varsity athlete and have always had lots of club involvements so I'm used to balancing multiple commitments

For those that have worked 80+ hours in a week, how would you suggest tackling this busy couple weeks? I've never been as busy as I am right now and maybe you guys have some tips/tricks? I don't use any stimulants beyond caffeine and the occasional zyn.

Thank you!