How much water do you and your family use each day? Don't know? Here (H20conserve.org) is a handy web calculator to help you find out. Benjamin and I use about 800 gallons of water a day, each (this includes the amount needed for our car, our food, and the actual water usage). In contrast, the average American uses about 1200 gallons a day. According to the World Health Organization, humans need about 13 gallons of water a day to stay healthy - in some places in Africa, they have less than a gallon a day. We are able to be so low thanks to the low-flow toilet, shower, and dishwasher, among other things. We are in a rental, so we can't change some things, but when we have our own home, we want to put in at least a rain barrel, if not a gray water capture system, and solar panels, and some day we will have a hybrid or electric car.
I don't know how much my parents use, but my mother leaves the water running while she brushes her teeth (Yes Mom, I am publicly shaming you - it is for your own good. Love you!) OK, to be fair, they do have a couple of water barrels that collect water off the roof, which they use in the garden.
Note: Somehow I didn't get the link on when I originally posted. It should be there now.