61 might be right for you. We did ours Part 61 and I never saw the advantage of 141 for a CFI applicant. Like the other guys said, do something you think is fun. Maybe a $100 dollar hamburger (since you've been 141 the entire time), or something outside of aviation.
When I went through training for my current job with a 135 operator, I had to study every night for weeks. But I always took some time, usually right after I got home, to just chill out and destress. You have to unwind somehow and find the good stuff instead of always worrying about how much there still is to learn. Otherwise you don't get anything productive out of the time you do study.