School's been in session for about a month here in the USA, and I thought it was high time to share my supplies -- my toolkit, if you will. I have classes Monday through Thursday, two on Monday/Wednesday and three on Tuesday/Thursday. Everyday, including the weekends, I use my agenda which is color-coded to the extreme.
For each set of classes I have a binder + a notebook for each class. I take those, as well as the textbooks I need, each day. I like to keep my supplies old school, so to speak. While I love my laptop, I don't take it with me to class or anything. I find that writing things down physically helps me to internalize the information I'm learning much more quickly than if I'm typing notes in class.