Advances in technology haven't just provided the masses with MP3 players and high-definition television. There's also been a big push to improve energy and water conservation in more mundane household appliances. Most appliances use water and electricity or natural gas, so buying energy-efficient models conserves all three.

When considering kitchen appliances, look for the Energy Star symbol. While the initial cost of the appliance may be higher than ones without the star symbol, energy savings throughout the life of the appliance will more than cover the additional purchase expense. If you take into account the initial purchase price, maintenance costs, and operational costs for a large appliance, you can expect to save about $200 a year; extending that amount over an expected operating life of five to ten years results in considerable savings.

One other way to reduce energy consumption is to stop using unnecessary appliances, such as the extra stand-alone freezer that runs year-round. Homeowners can consider purchasing fewer frozen food items or only using the extra freezer when needed.