Buying an outdoor storage building with a loft greatly increases storage capability, allowing you to store rarely used supplies overhead. For the exterior, build your own lean-to and attach it to the outdoor storage building to form a sheltered area for firewood.
A storage shed can be a very useful space when used appropriately. However, since it's a space that is used for utility, homeowners often don't give much thought as to how it is arranged. During the spring and summer months, yard tools are frequently hulled in and out to assist in landscaping projects. In the winter, you may have to scramble to find snow shovels and sleds, certainly not something anyone wants to do in a harsh winter.