Although it may seem like it, your life does not entirely revolve around school. Many other functions occur throughout your life and it is important that you remain organized throughout them all. Keep a planner is most likely the greatest advice I could give you. A planner allows you to keep track of all of your events, due dates, and so much more! Try to plan accordingly. Do not cram too many things into one day. Try to spread out your events as much as possible as to limit your stress.
The image of the planner above is my (Jordyn) personal planner. This is the first year I have invested in buying and using a planner and I am so glad I did! Using a planner lifts this weight off your shoulders of having to memorize all of your plans. Writing everything down not only helps you remember what you have to do, but you can actually go back to a hard copy and clarify what exactly you have to do. I highly recommend others to invest in a planner!
Visit the following link to shop for calendars, planners, and other organizing devices to help you survive!: Calendars & Planners at Office Depot