Even if your home's decor hasn't changed since 1976, you can refresh, revamp, and revitalize it at the holidays with just a few simple strokes. Unlike regular decorating - where you agonize over paint colors, upholstery choices, and furniture styles - holiday decorating is easy. Holidays provide a set theme; a color palette; and merchandise and motifs that are usually mass-manufactured, so you can purchase and decorate when you're ready. You may be...