Don't fall asleep in the shower. An extra five minutes in the shower could mean another 50 gallons down the drain. Use a moderate stream. Install water-saving showerheads. A quality water-saver showerhead provides a luxurious shower, yet uses no more than 2.5 gallons per minute.
Older showerheads use five to ten gallons a minute.
Ask your hardware retailer for advice. Take baths instead of showers. A partially filled tub uses less water than all but the shortest shower. Avoid toilet water waste. Do not use the toilet as a trash disposal.