Do you have a door to nowhere? Maybe it is the closet at the end of the hall or your storage room in the basement? Why not take that plain door and turn it into a door someone wants to open? Of course the downside is that someone may open it after you make it so appealing, but the benefit is that it will inspire you to make that closet or storage room amazing. What will be behind your new decorative door? I'm thinking wine cellar...