Use low-flow showerheads and faucets. Don't run water continuously when washing dishes by hand, brushing your teeth, shaving or washing your face, or washing your car. Wash only full loads in your dishwasher and washing machine. Take short showers. Check for leaky faucets and repair them. Water your lawn in the morning or evening to reduce evaporation, and water it only when necessary. Put a trigger nozzle on your outdoor hose; it uses water more efficiently. It's not necessary to water your driveway. After all, it won't grow.