Never buy/rent your textbooks from the college bookstore unless you can’t find them anywhere else online. Seriously, bookstores overprice the shit out of your books and you will save alot of money getting them from Amazon, Chegg, Ebay, etc instead.
I always love the opportunity to be able to talk about http://archive.org because it is such a wonderful and free resource. For a college student it definitely has so much to offer in terms of educational and entertainment resources.
It has millions of free downloads for music, movies, books, software, etc. One very popular example is that it is home to a very large catalog of Grateful Dead recordings
There is also The Internet Arcade where you can play a lot of classic games along with the Console Living Room which is similar. They have access to tons of old PC games too and you can even play the original Oregon Trail online. There’s a lot more in their software section too.
It also has The WayBack Machine which has archived more than 458 billion web pages saved so you can go back and see how websites were years ago. For example, here’s reddit on July 25, 2005 a month after it was created.
It is a user friendly search engine and a lot of fun!
Pay attention to events calendars. Most college events have free food. This may be different for this semester, but don’t underestimate it down the road.
Do you mean it in terms of knowledge gaining? If yes, you can find pretty quality lectures/courses on YouTube for a specific topic. If you want more structured and organised lessons check skillshare/udemia.