Save up a full load before turning the machine on. Turn off the tap when brushing your teeth or shaving. Wash your car using a bucket and sponge. Hose only for a quick final rinse. By washing your car on the lawn, your grass gets some water as well.
Every household is different and has different water and energy requirements.
Have a family discussion to come up with more suggestions to suit your own circumstances. Fix tap drippings. 60 drops per minute means about 400 litres of water a month goes down the drain.