You should monitor your sites ranking at least every 3 months.
If you are not listed, resubmit your site.
If you are not listed in the top 30 search results for your chosen
keywords, re-optimise your site and consider resubmitting that page.
When using search engine marketing techniques
to get higher rankings in the search engines, pay particular attention
to your home page. Your home page is the main page to optimise, since
the home page (default or root page) is often given greater weighting
than any other page.
Remember, there is little point in getting a top ranking for keywords
that no-one searches for, so make sure you do your keyword
research.