Choose fixtures certified to meet WaterSense criteria, which offer a flow rate of 1.5 gallons per minute (gpm), compared to an industry standard of 2.2 gpm. WaterSense is a partnership program sponsored by the U.S. Environmental Protection Agency that aims to decrease indoor and outdoor water use through water-efficient products and simple, water-saving practices. All of Moen's lavatory faucets are certified to meet WaterSense criteria.
Add faucet aerators (2.2 gpm rating is adequate) to existing kitchen faucets to conserve water without reducing pressure.
Use as little fertilizer as possible - it can increase plants' water consumption.
Take a peak at the extended list. Although it was made to educate Moen dealers and distributors, the tips are immediately applicable for the homeowner looking to conserve water around the home.