Robin Hanson recently quoted this book. It summarizes the most effective learning strategies (and was written by a pair of cognitive scientists who just spent a decade studying optimal learning). It should come with a disclaimer that (contrary to what most people will tell you), college isn't about learning, so if you just go there to learn but not jump through the other hoops, things will end badly (relevant Quora answer, SMBC, lecture; the lecture is imperfect, but still valuable).

I also found HPMOR useful when I was in college.