Remember that these structures are not merely for storing things away. In addition to their usefulness, the appearance of appealing outside storage shed affects the overall appearance of the property on which they are installed. As such, the unit you choose should be of a design that complements your home. Select one with a rustic design (for instance, board and batten) for a country-style house. If your house's style is more formal, select an appealing outside storage shed with formal features to match (for instance, if your house has an arched window, carry the theme over to your outbuilding).
Garden supplies tend to end up everywhere, especially if you do any potting in your shed. Always make sure to have a clean surface to work on. Old crates work well to hang from your potting area, where you can put small bags of soil, pots and watering cans. For seeds and other loose items, hang a ribbon and attach clothes pin. As you get small packets of seeds, use the clothespins to hang from the ribbon, taking down as needed. This keeps them organized and out of your workspace, so you can make the most of your gardening.