Who doesn't like gathering around the fireplace on a chilly holiday eve? Use leftover tin tiles from a backsplash or ceiling project to create an ornate, small-scale pattern highlighting the narrow space around the hearth. Cut the tiles to fit from large panels, then cover the surround with cement backer board and affix the tin with a heat-resistant construction adhesive.
Choose metal ceiling tiles with a small repeat so that you can cut them without ruining the pattern. Tin, $20 for a 2-by-4-foot sheet; classicceilings.com