I've been puttering around this subject on the drawing board since the spring and have never quite gotten it down to a neat, clean post. Finally it seems like the best idea might be to just throw some sustainable practices out there and then I'll add to them via comments or later posts.
There are numerous guides and top tens out there. Several of them, I found, didn't really take the bull by the horns. Many of these lists are designed to sell various products, etc. Still, they are definitely worth looking at.
One is the Top 10 Sustainable Garden Methods someone put together on Squidoo. Some of these guides are quick and practical. Others are quite general and theoretical, such as the extensive site, Sustainable Landscaping, by Dr. Marietta Loehrlein, Professor of Horticulture, Western Illinois University. Dr. Loehrlein was spending an hour a week on her riding mower when she started the project!
Anyway, as much as I check these lists and "tips", I keep seeing that most of them don't even mention the concept of using a manual lawnmower, so it's hard to take them seriously. Better to start another list!
Co2 Art's Best Practices and Solutions for Sustainable Landscaping and Green Gardening
1. Leave or return your landscape as wild as possible
2. Reduce areas of lawn
3. Use manual lawnmower
4. Use manual trimmers, etc.
5. If hiring landscaping contractors, insist on green practices
6. Conserve water by using rainwater, redirecting run-off
8. Use Native Plants
10. Exploit shade and windbreak benefits when planting trees
11.Recycle and use sustainable materials