How to save water... Start filling a supply
Mess around with toilet mechanism to fill to half than usual volume/replace with reuse water as mentioned above.
Fill bottles with water, fit small tube usually used in fish tanks, fit on lid, to use for washing hands and other small uses for clean water..
Drink less coffee/Tee. Drink more cooldrink... it's already made with water when there was still right...
Or drink milk... doesn't need water
Braai More... never need water to cook anything... Sorry to those who do not eat meat... braai veggies too maybe