With over 2 billion Energy Star-certified products sold in the U.S. since 1992, energy-saving appliances are becoming the rule, rather than the exception. Then, the Environmental Protection Agency—the program's creator—tried to duplicate its success with the water-conserving campaign called WaterSense. First up was a label for toilets that use less than 1.3 gallons per flush—that's 20 percent less water than the 1.6 gallons currently required by federal law. WaterSense plans to set standards for other products, such as washing machines and dishwashers. Until then, follow these five simple steps to make your home more H2O-efficient.