I'm in university now, in my fourth/final year. I was always good at tests in school with minimal effort, and was always praised for doing well (by friends/family).

Now, in university when actual effort is needed to learn the material, and there's so much material, I know I need to learn it all but only manage to sit down and go over everything for a week before the exam. So if I have 3 exams in the exam period, I'll start revision 3-4 weeks before, so there's a week per exam to cover everything. It's barely enough time, but it's always worked well enough (even though my stress levels end up unhealthy) that I haven't changed. I know I could have done better though, but I can't go back. But at least there's no exams this year