Its radically different. In undergrad I didn't know how to study. I'd go over the material once on my own before exams. In MS I do spaced repetition in effect going over things 3-4 times before exams. Its also much longer chunks of time. Finding study spaces that work for you because you get aversions to your primary ones has become a thing. I used to take paper notes in undergrad and for MS switched to using OneNote which is a godsend because paper notes are inefficient, your writing hand will hurt and they can get lost. I also recently got a tablet so I could review notes for 3-4 hrs at the gym on the treadmill while walking just so my body doesn't just atrophy. The sync to other devices feature is really nice. I do like 8-10mi and get in solid study time.
Try to get in free time for yourself and especially make time for the gym. Gotta plan ahead though and sometimes might require you to cram all your stuff into a break or something. I still look out for concerts and cool stuff going on--gotta stay sane. Still monitor investments, still go out for dinners with friends, time with the parental units, we still drink like fish after exams.
I hear you on the butt-hurt. Also I'd say hamstring/quads are always antsy. I take notes like crazy though. How do you get away with minimal notes?
