Check pipes for leaks-a small drip can waste up to 20 litres per day. Larger leaks can waste 100s of litres per day. Check all faucets, pipes and toilets for leaks. Install water saving showerheads and ultra-low-flush toilets. Take shorter showers. Never use your toilet as a wastebasket. Turn off the water while brushing your teeth or shaving. Defrost frozen food in the refrigerator.