This is one of the top classes (can take the free version) on Coursera ever.
https://www.coursera.org/learn/learning-how-to-learn
No matter how good or bad a student you were/are, or how expert you may have become at something, probably good theoretical/practical lessons.
If you just want some good notes / TL;DR: here are a few:
https://www.reddit.com/r/GetMotivated/c ... ra_course/