The Container Store

As the name suggests, this much-loved chain stocks every container and device you would ever need to organize everything from your wardrobe to the space beneath the kitchen sink. Seek out their designers, who can whip up a customized plan on the spot (you can keep the plan, even if you don't purchase the components)—if you decide to buy (and you might, because it's actually affordable and easy-to-reconfigure should you relocate), they can cut Elfa shelving to your specifications while you wait.