My website, greenmowers.org, was the first result for green mower and green mowers on google. Now, my website keeps falling in rankings. I have begun to update the content, and get more backlinks. Can I do anything else to keep my website from falling any further!?
May be its due to the recent Google algorithm changes: The Farmer Update. People can check if there site is affected by the recent Google Farmer Update by going to Google trends http://trends.google.com/websites
Your website is on top for those results in Google.com. Could have been a temporary fluctuation. In any case, your website isn't all that search engine optimized or user friendly. There is room for improvement.
You can also try adding a variety of different content which Google likes to see. -Images -Videos -Links -Backlinks -RSS Feeds -Blog Section -Comment Section -Articles Hope this helps! -LeadBoltMatt
Make sure only about 1/3 of your traffic comes from search engines. It will save you heaps of headaches when future Google updates come.