Let's face it – your house is not big enough to store all your stuff, and neither is your office. There comes a point when you need to look at commercial storage options. In other words, you need to pay someone to take care of your belongings. This is not so bad, though. There are some good options available to you that you will find in detail here in this article.
If you only have the extra stuff lying around, your best bet may be to hire a self-storage unit. You've seen these places before. They look like small settlements made out of the garage. They are not really a garage, though; they are execellent coolrooms that can be rented for a small monthly fee.
Some things just can not be stored in a closet or in a self-storage unit. If you need a place to store volatile chemicals or perishable goods, the only option you have is to go to the pros. There are many great companies out there that will keep items for a reasonable fee. Do a search for local chemical storage or cold storage services. You might want to think about hiring a moving company to transport your stuff around.
You may not have enough stuff in your house to rent a warehouse, but you might have enough if you have a small business. If your office that is packed to the brim with supplies, consider looking for a local warehouse. You will be surprised at how much better your office looks when you have space to move around.