If you're a teacher and your classroom is getting cramped because you're storing school supplies in it, you can create some extra space by moving them into a self-storage unit. Self-storage is inexpensive and will give you a place to store classroom supplies when they're not needed. You'll be able to move all of the plastic bins and shelves you're currently using for storage in the classroom out of it to free up space.
You may have one or more hobbies or types of crafting you really enjoy. However, the amount of space those hobbies require for all the materials, tools, and other supplies can present problems for you. There might not be enough space in your home for you to keep everything. This may have led to you putting those hobbies to the side. Instead of quitting something that you get a lot of enjoyment out of, consider whether self-storage can be of assistance.