NYT: Forget What You Know About Good Study Habits.
That might be good advice. I am not sure. What always worked best for me in college and in law school was a ration of 2hrs/studying in the library to 1/hr discussing and mutual quizzing with somebody in the course.
From the latter, I learned to interrogate my own understanding after I read anything. It's become a habit for me. If I can't explain back what I've read after I have read it, I've gotten nothing from it.