How do I get an A+ in any given course?

I'm taking this math course and the final is soon. I just got done writing all my lecture notes with annotations today. I'm reading through the textbook and it's clear cut, I haven't done some remaining practice problems yet.

Essentially I think the key is to read whatever topic you're studying from as many sources as you possibly can, and exercise your brain to it in as many ways as possible. Take notes, practice problems, read the textbook, and review.