Here's how I do it: I remove the lawn. I really do. And I advocate that because it is such a sink for our natural resources to keep it looking good. I love going in and taking lawns out and creating open borders where we utilize trees, shrubs, outstanding perennials that are drought-tolerant and deer-resistant and that give us so much more interest.
But if you absolutely have to do a lawn (and obviously there are places where you would want a lawn), there are many organic products out now for lawn maintenance. Paul Tukey does a lot in this area and he has a book called The Organic Lawn Care Manual. Also we're fortunate that with Google, you can search under "organic lawn care" and find a lot of really great products now. The problem with lawns in many of our areas is that they still require water, a great deal of water, and many times they require mowing, which consumes gas, and is another issue as far as our imprint.
