Tricky space 1: Long, narrow hallThe solution: Think art gallery. Fresh white walls are the classic choice, though textured grasscloth or a coat of rich color would work equally well. Go sleek and simple with all black and white pieces, or create a quirky gallery with eclectic, colorful artwork hung in a line, with some frames left intentionally empty. Finish the space with proper lighting. Try overhead track lighting and/or small wall-mounted lights to illuminate the art.