Another I don't understand why everyone doesn't have one. A machine that washes AND dries clothes. If you have an automatic washer and an automatic dryer, why not go totally automatic and have it dry clothes too. It costs about the same as a washer and dryer together.
If you want to really save water there is the wringer washer. But then laundry is a whole-day affair. Start with the cleanest and end with the dirtiest using the same water. My mother always had a wringer washer when I was growing up. I wonder when water will become so scarce that we will be back to wringer washers. Right now I think about the only place you can buy them is at Lehman's. They have one made in Saudi Arabia. I guess even with all that oil, water is still at a premium in the desert.