To what level do most of you rely on your own handwritten class notes after the fact? I ask because I produce reams of paperwork, but can't imagine any of it ever being useful and am highly tempted to consign most of it to the bin. I would always go to a book on the subject before my notes if I wanted to recall something. I use note-taking purely as a means of committing information to memory - they're a mechanism. Once written they are of no use to me beyond occasionally retracing my thoughts for completing assignments. So, do any of you find your old university notes useful maybe years after making them?