The Art of Self-Directed Learning
Some good insights here on How To Study: A Brief Guide by William J. Rapaport
I am going to give you some suggestions on how to study efficiently. They worked for me when I was in high school, college, and graduate school. Not only that, but they worked equally well for me in humanities courses (like philosophy and literature) and in science courses (like math and computer science). But, to the extent that everyone's styles may be different, some of my suggestions may not work for you, at least not without some individual modifications. Nevertheless, I urge you to try them. Most successful students use them (or some slight variation of them).