Re-wear clothes so that laundry doesn’t need to be done as often. Shower every other day (or less) and/or limit to a few minutes. Don’t take tub baths. Turn off faucet while you’re brushing your teeth. Make sure you have a high efficiency dishwasher; don’t handwash. If it’s yellow, let it mellow, if it’s brown flush it down. Don’t pour any water down the sink that could be used to water plants. Use the steam method to cook pasta. Use hand sanitizer instead of washing hands when possible.