For the Toilet: Fill bottles with sand or pebbles, and put in the back of the tank. This essentially creates a low-water flush, saving more than 2 gallons a flush!
For the Shower: Install a low flow showerhead, and take shorter showers. You could save up to 40 gallons of water every 5 minutes!
For the Sink: Turn the water off while you are brushing your teeth or shaving. You could save 6 gallons of water a day!
Now those are some pretty good tips! If you have tips that are working in your life, respond in the comments section and we will post them!