Pretend you're a famous (or soon-to-be!) inventor. What would you create for the self-storage industry?

Do you ever have those moments of frustration when you think to yourself, "If only I had a thingy-ma-jig to fix this." What would the thingy-ma-jig do?

Or, have you ever had a great idea hit you, sideblind you, the perfect invention to resolve a problem you've had while on the job?
what would it be?
