Did you know you waste about a gallon of water every time you take a shower? It happens when you wait for the hot water to start running in the shower, and all that perfectly clean cold water goes straight down the drain. The next time you shower, consider bringing a watering can or bucket into the bathroom with you. Fill it with the cold water and set it aside. Then use the clean water to water plants, or add an all-natural soap to use it to mop and clean the floors. With some states facing the worst drought in history, this one thing really does help.