If your dishwasher is over 10 years old, replacing it with a new Energy Star qualified dishwasher will save over $145 a year on the home's utiity bills, according to The Real Estate Professional Magazine.
For energy efficiency, insulate to Energy Star recommended levels and air seal as needed. Energy Star's Do-It-Yourself Guide to Sealing and Insulating with Energy Star is a great resource. Visit www.energystar.gov; click on "Home Improvement" then "Air Seal and Insulate".
For water efficiency, fix al leaks and add low-flow showerheads and aerators for faucets. If you have to replace a toilet, choose a low-flow model. Learn more at www.epa.gov/ow; click on "What You Can Do".
For better indoor air quality, choose paints, finishes, flooring, and carpeting with low or no levels of volatile organic compounds (VOCs). Visit www.epa.gov/iaq/voc.html.
When you have an energy efficient home, call attention to it while it's on the market with simple but informative signage on items you want to highlight.