I did include the video above for reference purposes only I am not the owner! It is boring watch based on your desire☺️
-Don't have loose papers. Organize your papers and handouts in a type of organization system.
-One way you can organize your papers is through a binder. You can either get a huge 2 inch binder for all your classes (which is what I do) or get a binder for every subject and use dividers to organize all your papers
-You can also use one of those huge accordions (I think that's what there called) and just separate your classses like that
-Apps! There are a bunch of apps to organize your life and here are just a few of them:
~Timetable when you have a day where you have a bunch of studying to do and you need to allot time to each subject you need to study you can do it on this app. Although, if you want to get reminders and get the full effect you need to buy the full version for $0.99
~My homework or really any planner/homework app but My homework has some specific features I like. It has a really nice interface which will organize your assignments to the ones that are due soonest to latest (if that makes sense). You can upload your class schedule. You can create classes to easily organize all your homework assignments. Lastly, if you use teacher.io it'll upload all the info. There is obviously more features that makes this app is amazing and many other apps have the same features but this is my preference.
~Reminders/Calendar/Notes are all apps included with any apple phone and although these do not have all of them fancy features they still get the job done. These will be good to use if you don't have any more room on your phone or if you just want to use these apps.
-Have a planner to organize all events and assignments. Me personally I need to physically see a layout of my week and everything I need to do so I use a physical planner to add any notes and to add my extra flair.
-To do lists are key so when you have a lot of tasks empty out your brain of everything you need to do and then prioritize the tasks from what you need to do immediately and the one's that can wait
-Have one notebook for every class I can't take notes on loose leaf and organize them in a binder I may go insane
-If you don't want to use notebooks you can always take digital notes. Some apps that are good for that is Notability, Good notes 4, and Evernote