An old door is do-it-yourself gold. I never, ever advocate for holding onto stuff "just in case you might use it one day", except in the case of old doors. An old door can substitute for large wooden board in almost any project that calls for one. Old doors have personality. One old door might have interesting woodwork; another might have a glass window panel. They can be refinished to match newer wood, or you can utilize an existing rustic, chippy finish.
I chose projects by five DIY bloggers to show you options for upcycling old doors. These bloggers have created polished, professional-looking pieces, which are actually replicable. With an old door and some basic tools, you're on your way to building a stylish and useful piece of furniture or storage solution.
DIY headboard made from an old door: DIY headboards are extraordinarily popular on the DIY blog-o-sphere. It seems like every accomplished DIY blogger has posted his or her version of this project. It basically entails refinishing and painting an old door, and affixing legs to it. The project that I chose to link to is by Vintage Headboards, a professional carpenter near Dallas. The photos of his projects that he has posted on Hometalk.com are ample inspiration for DIY builders. He has posted step-by-step photos of how he builds his vintage door headboards.