Find two doors that you love, add trim, and make a corner cabinet. Great idea @ House Remodel Ideas it would be nice to add a shoe rack or boot rack behind those doors, then you have more closet space.
DIY Decorating Ideas: Repurpose an old door into a bookcase by cutting it in half and adding shelves. Finish it off with a vibrant high-gloss Metal & Wood in a Benjamin Moore color to give it a fresh modern feel.
old screen door cabinet - would make a great pantry! Would also look good with a wood door cut in half for 2 doors. I'd say make this and attach it to outside of the house for an outdoor garden tool closet!
old doors made into corner shelves.buy old door at architectual salvage and get pieces of hardboard for the shelves. Cut door in half to make each side of the corner shelf. Could also use old barnwood for shelves