Summarize:

Instead of shoving your assignments into your locker, keep them in a binder with dividers organizing which class the assignments are for. This will help you remember what you need to get done and you will be less likely to lose important assignments in your locker if you know when they are due. Whether it is at lunch, between class, or after school, find a good time to reorganize. Everyday make sure your assignments are in the correct place and your locker only contains the items that are supposed to be there. This will help prevent your locker from getting messy.
Get a binder for your assignments. Write down your assignments in a planner. Find a good time everyday to keep things organized.