And if you're feeling ambitious, look into installing a grey water system to collect laundry water and reuse it for, say, flushing your toilet.
After boiling pasta, let the water cool and use it to water your plants or garden. As you wait for your shower to heat up, capture that cold water in a bucket. And if you're feeling ambitious, look into installing a grey water system to collect laundry water and reuse it for, say, flushing your toilet.