One of my classmates in college was a grade A student, he HAD to get an A, no matter what, a B was never good enough. He would study and study and study when most people would just do their best. Especially the really tedious tests where there is just so much to study, you kind of just need to set yourself a limit so you can work on other stuff too and accept that you might forget some stuff.
Only problem he was also super into WoW. So he would study past midnight, and then play WoW for another couple hours after, then show up the next morning bloodshot eyed because he only had like 2 hours of sleep. Every day of the week.
There was one class however where we did not have any homework, or tests, or anything, the whole point of the class was a 100% self paced project we had to work on, and then write a technical report on it. I cheated a tad, I had previously written a forum software so I just polished it and wrote the report on that. He however, kept procrastinating. I don't even think he had a project idea let alone start, ever.
Next thing you know... it was grad day. We're like "Where's Doug?" The dean overheard us and is like "oh, he didn't make it". He failed the entire program because he failed to do his technical report lol. He did not want to retake it so ended up taking some other program out of town. No idea where he is now.