I am also a student. I have 4 main binders (3'), organized by my goal in life right now, "to obtain my degree, using my own money, while caring for my self".
1. self care (incl. hobbies and spiritual)
2. physical care
3. financial care
4. career care (incl. work and school)
Each binder has 2 main sections: active and someday/maybe.
My goal gives me parameters for decisions about active vs. someday/maybe projects and tasks. If something does not contribute to my immediate 1)self care 2)physical care 3) financial care or 4) career care (including my degree), then I put it on someday/maybe.
All my computer files are also set up according to these categories/subcategories. Everything is very easy to find, because the system is so intuitive to my goal.
The secret to getting binders is, if you have a freecycle group in your area, to ask for large size binders. I received over 15 free large binders from people who had been saving them in their basements (people who work for government or big business seem to get a lot of binders to take home). I used the other binders for my course materials.
I purchased a large used bookshelf for 100$ which holds the binders so they are always accessible. I also purchased a labeller (30$, and buy label tapes 20$/term). All my binders and their subsections are labelled and they look very professional which is good to remind me I will benefit from all this hard work financially one day.
Best wishes for your goals