Originally Posted by Nancy

I leave a large bowl in my kitchen sink to catch virtually all of the water I use (from washing hands, washing dishes, etc.). When the bowl fills up, I just walk it outside and pour it whatever plants are thirsty (usually bananas, not surprisingly). I just can't stand waste. Depending on the size of your family, you can save gallons of water each day.

Oh, even easier: I keep a bucket in the shower, and while I wait for the water to warm up I fill up the bucket, which I later empty on thirsty plants. Every drop counts.