All together now. A well-trimmed room is something special. Its baseboard, casings and crown all relate to each other in their style, proportions, sizing and finish. In this example, the baseboard appears to follow the 7 percent guideline: The casings are about half the size of the baseboard, and the crown looks to be just slightly smaller than the baseboard. There's no doubt that the trim for this room was conceived as part of the overall design.
2. Clear out the clutter. Historic homeowners tend to be collectors and don't always tune in to the crowded look that can create over time. Clear away clutter and create symmetry in the furniture arrangements, and buyers won't miss your home's good bones and architectural gravitas.