Many people think that picture-hanging is a science only decorators understand, but Tippin says it's more a matter of intuition—and not becoming paralyzed by insecurity. The idea to hang art below the sconces in the Glassmans' living and dining rooms "came to me in my sleep," he admits. "If it feels good proportionally, then just go with it. Art is something that can always be changed. You don't have too be too serious about it."