Keep track of how much traffic your page gets.Track how 'visible' your page is on search engines.
Compare your local rank to your national rank.The only way to ensure that your site is able to compete and stay in business is to constantly monitor it and ensure that your SEO efforts are getting the job done.
All it takes is for your competitor to have better keyword rankings or search engine updates to change everybody's rankings across the board. Just because your site is on the first page today doesn't mean that it will stay there forever. Search engines are constantly changing their algorithms and the way that they process information and track rankings. However, that is no longer a strategy that works in today's world. In the old days, you could create a webpage, optimize it for one or two keywords, and then let the search engine 'spiders' do their thing.
Today, search engines are more competitive than they've ever been.
