Most homes have one: That room where unwanted things go to die—or at least to be hidden from sight for a while. Maybe it was a kid’s room at one time. And maybe it’s not really a “junk” room, but it’s certainly not living up to its potential. How can you get the most out of that extra room? Sometimes homeowners look at remodeling as a way to expand their living space. But sometimes the real issue is extending the usability of the space that's already there.