I currently study undergraduate physics. I used to have the philosophy that the only way you really learn stuff was by reading all the chapters in the textbook. But now I'm on my 5th semester taking upper-level undergraduate courses and starting to think this philosophy will drain all my energy away (consider I take 7 courses / semester). There's hardly any healthy way I can do all those long difficult homeworks they assign to me while at the same time reading 50 page chapters on relevant textbooks. So, I'm starting to think my main use of those books this semester is going to be to know how to solve problems and less to properly digest the concepts in it. I hate to do this, but I'm afraid I'll simply lose my mind if I read the chapters. What do you guys suggest? How did you do it as an undergrad?