1. Planner.
Clearly, nothing is more crucial for planning for the semester like… well, a planner. I love the kinds that have a month view AND a weekly view. Sometimes, all you may need is the monthly view and that’s fine. But, in every semester, there comes a week (usually before a big break or exams) where you are literally just trying to survive each day. For those weeks, it is super helpful to have the weekly view to break down in detail what needs to be done each day.