Next to my Academic Planner, my Binder is the most important Back to School essential. As a undergrad, I had a binder for each subject: computer information systems, finance, marketing, & management. For grad school, I have a binder for each semester. Most of my textbooks are loose leaf so I put them behind the tab of each course for the semester & then everything for the semester is in one binder.
I put a large clear sticky corner pocket on both sides of the binder to put any loose paper or assignments due. I used the customizable event stickers to colour code stickers for assignments, projects, papers, exams, & tests as well ass for course labels. I use the course labels in my Academic Planner & on the tab dividers. I have 2 matching folders that I hole punched & keep in the back of my binder. I added a pen holder to my binder so its easier to take notes & take my binder on the go. I also use a planny pack to store extra school supplies for when I run to class.