Look at installing a dual flush conversion system to all your toilets so that you can use less water when flushing.
Your shower head blows out 3 gallons of water per minute, so take a look at reducing the shower time to 3 minutes and turning down the shower while you scrub. Fit in a low flow shower head, and you’ll get half the volume of water every minute.
Fit low-flow faucet aerators to your kitchen and bathroom faucets to reduce your water bills. Remember to shut the tap after you brush your teeth or wash your hands in order to conserve more water.
Hand washing individual dishes uses a lot more water than dishwasher. Make sure you fully load your dishwasher every time.
Start by measuring how much water you and your family use every day. Then look at ways to minimize water use and see how much water you’ve saved.