So I just found out my grade for Calc I and I got a B-. I'm pretty disappointed in myself because I feel like I could've received at least a B+/A- if I wasn't so lazy. There were exams/quizzes that I seriously didn't study for at all besides a quick 10 minute glimpse in my notes. So I think it's safe to say that the first thing I need to do to prepare for Calculus II is to get rid of the lazy habit. Now I've heard that Calc II is supposed to be the most difficult calculus course. So how should I prepare for it? Which things from Precalc and Calc I should I review and be absolutely certain that I know?