You've got this, don't stress!! My biggest advice is get big planner, that has the month at a glance as well as weekly broken down (I have one I got a Michaels arts and crafts store called my big happy planner)! Color code each class, on your month at a glance part write down due dates for assignments, quizzes and tests!! The weekly part put what chapters or assignments are required to be done that week!! Hope that helps!!