Here's a simple thing you can do to save water:
  When you brush your teeth or wash your hands, turn off the water
inbetween. It may take a while to get into the habit, so stick up a note up on your
mirror so you don't forget!  Although it may not sound like much, think of how many times you brush your teeth or wash your hands in your life. That adds up to a lot of water! Also, other people might see your example and switch their water-using methods. I started turning off the water while brushing my teeth when I saw a friend do it at a sleepover.