You might question whether focusing on grades is the best way to really "get something" out of university. I've benefitted a lot from my time in undergrad, but

You might question whether focusing on grades is the best way to really "get something" out of university. I've benefitted a lot from my time in undergrad, but mainly thorough what I've learned working on CS research with a professor, or the time I've spent hacking on startups/projects. That said, I can understand the drive to do well in class. I've done pretty well myself, despite my nonchalance. I also share your aversion to studying (generally speaking, I don't "study"). My advice then, if you want good grades, is first to take seriously any problem sets you are assigned, and second to go to class. At least in my case, the rest seems to take care of itself, studying or no studying.