A standard showerhead flows at about 2.5 gallons per minute, so a five-minute shower uses between 10 and 25 gallons every single time.
Install a low-flow showerhead for under thirty dollars, which cuts flow without making the pressure feel weak.
Set a timer or play a short song to keep showers under five minutes, since every minute saved is about two and a half gallons.
Turn the water off while you lather or shampoo, because that pause alone can save several gallons per shower.
Small changes to a daily routine save more water than most people ever realize.