Pay attention to architectural details. Window shutters, molding around windows and doors, trim with backband and other exterior details can all add interest to exterior styles. And energy-efficient windows, new trim, gutters and siding can improve performance as well as aesthetic. "Anything that improves the building envelope as well as curb appeal will go a long way, especially if you're going to be selling your home," says Sheffield. If it's in your budget, it could be worth considering an update to your home's roof. This often-overlooked part of the exterior can make or break a home's curb appeal. "Think of it as the cap or crown to your home," says Human. "If your whole house is spotless and the roof is looking tired, it will bring the whole thing down."More:5 Bright Palettes for Front DoorsTop 3 Ways to Light Your Landscape7 Details for the Well-Dressed House