You are travelling for an extended period
Anyone interested in long-term travel should consider storage units as an option. If you're going on an extended trip or don't know when you'll return, a self-storage unit is your cheapest storage option. Think your trip may result in a move? Consider a mobile storage unit to give yourself added flexibility.
You are relocating for a new job
Working in a new city or country is another good reason to take advantage of storage services. If you're renting a house or apartment, it is almost always the cheapest option to leave your stuff in storage. If your situation could become permanent or you have some things that you may need later on, check with companies that offer mobile storage facilities to see if they can move your stuff internationally. If you know the length of your assignment, it's probably cheaper to leave them in a local storage unit.
You need extra living space
Another reason to consider using storage services is to clean up your living space. There will always be things in your life that currently serve no purpose in your life but have too high sentimental value to be simply thrown out. You could store these items in the garage or attic, but if it will be years before these things will be useful or if they are being saved for your children, it will be worth it to put it all in storage where they will not be susceptible to temperature and humidity damage.
Your business needs temporary inventory storage
If you run a small business, local storage units are a great way to store excess inventory and old files and records that are seldom accessed. The wonderful thing about these is that you can pick whatever size is relevant for your needs and thus free up space and remove clutter from your current workspace. It's best to have something that you have constant access to and is never very far away so that accessibility is never an issue for your company.
You are a student living on campus
Being a student presents a strange living situation in that most move away during the summer break months. Generally, students live in one residence for 9 months, leave for 3 months, and then move into a new house or apartment when returning. Instead of moving everything home for the summer, put your belongings in a storage unit close by and then there is no unpacking when you get home and no packing when get back. If you have to make more than two trips to move all of your stuff to a storage unit, consider getting a portable storage unit for added convenience.
If you fall into one of these situations and are thinking about renting a storage space, there are plenty of cheap storage options available in the market. Shop around and find the one that's right for you.