Over the door storage baskets...link also includes site to purchase other over the door storage for pantry, cabinets, and more.
Back of Closet Door is organized with Container Store Elfa unit. Organized Linen Closet
Ana White | Build a Behind Closet Door Storage | Free and Easy DIY Project and Furniture Plans
25 Lifehacks For Your Tiny Closet – BuzzFeed Mobile | best stuff
This elfa door & wall rack solution can not only hold your spices, but it can contain your Hungry Caterpillars and your Goodnight Moons.
Elfa behind the door wall system for organizing crafts, gift wrap and supplies. Such a great way to maximize space. Iheartorganizing
Closet Door Storage Space ~ To stock up when on sale. Hide in hallway bathroom closet
Condo Laundry Closet Storage Ideas
Tiny spots in closet or back of the door. use for small things, scarves, belts, hats, you can even pin earrings to them.
A magazine rack can make the back of your door do double duty.