If there was ever an incentive to get rid of old clothes and other items you don't use anymore, it's a lack of space. Modular closet storage organizers will help you arrange your belongings and encourage you to manage them efficiently. If your wardrobe is bursting at the seams, consider investing in a closet hanger system, too. While you contemplate donating that style-challenged coat to the local homeless shelter, consider the fact that you'll generate more than 600 times your adult body weight in trash over a lifetime. How much stuff do you really need to be happy? Rethinking your priorities could help save the planet while saving you money -- and floor space.