Place a brick or soda bottle in the corner of the toilet tank to displace some of the water needed to flush.
Do not run the faucet while brushing your teeth.
While waiting for the shower to warm up, collect the cold water in a 5-gallon bucket and use it for watering plants or cleaning.
Take short showers instead of baths.
During emergencies: Take sponge baths instead of showers.
Flush the toilet only for solid waste; for liquid waste, use it throughout the day before flushing.
Laundry
Wait until you have a full load of laundry before running the washer.
Kitchen
Prior to washing dishes by hand or using a dishwasher, scrape food off plates over the trash instead of rinsing them with tap water.
If washing dishes by hand, plug the drain and fill the sink with soapy water instead of running the tap.
If using a dishwasher, run the dishwasher only when it’s full. You do not need to pre-rinse dishes before loading the dishwasher.
In an emergency, collect graywater that was used for washing and use for flushing the toilet or watering plants. Use graywater as soon as possible: Do not store it for longer than 24 hours as bacteria or mold will multiply.
If the tap is not running, use paper plates, cups, and disposable utensils instead of dishes.