Do you have an extra spare room in your house or room in your basement or garage. Do you have plenty of land for parking cars and RV's? Why not rent it out and earn some money?
Set up an account at www.storeatmyhouse.com or place an ad on craigslist.
Outline exactly what you are offering, whether it is a parking space for an RV for 3 months or a dry area in your basement, be specific.
Provide a rental agreement that states what your service will be and exactly what you are storing. The agreement should benefit both of you and also help relieve any stress that the owner or the stored items may have over losing their items. There is also a sample agreement at the storeatmyhouse website.
Require first and last months rent or a deposit.