I went through years of undergrad without using the library once. It's really not much of a mystery how I did it. I bought a lot of books that were good, our Uni library gives us access to something like 100'000 books in PDF (well, I guess you could call that a 'visit' to the library) and the rest can be downloaded from the internet. Besides, lots of lectures had very good handouts and ain't nobody got time to read a lot of technical books.