Wash only full loads in the dishwasher. Install a faucet aerator on the kitchen faucet. Available at the hardware store. Keep a jug of chilled water in the refrigerator for drinking. In the laundry Wash only full loads of clothing.
Hand wash single garments.
Consider purchasing a suds saver for reusing lightly soiled wash water. Outside Water your lawn only in the cool parts of the day to minimize evaporation. Light sprinklings tend to evaporate quickly and encourage shallow root growth. Heavy sprinklings run off and waste water. Listen to weather forecasts to avoid unnecessary watering.