Take a hard look to see if there are things you can keep—appliances, cabinets, hardware, faucets, and sinks are all candidates for reuse or refurb rather than replacement. A caveat: Don’t keep any faucet purchased before 1997, because it’s likely to contain some lead. And dispense with any appliances more than 10 years old. Energy Star appliances are leaps and bounds ahead of their ancestors in terms of energy-efficiency.