How to study in college?

How do you study in college? What are some tips you have and how long do you study for? Do you take rests/breaks?

I study by reading the textbook, taking extra notes along side lecture notes of what I read, I do extra research online of concepts I’m not understanding well, color code everything, record lectures and listen to them, make flash cards.
I study for either an hour to three hours, take a 20 minute break, go back to studying. And I can sometimes just keep doing this all day, with longer breaks to eat and whatever.

Basically do everything you did in high school to study.