How can I improve my site ranking? 

Sites' positions in google search results are determined based on a number of  factors designed to provide end-users with helpful, accurate search results. These factors are explained in more detail at http://www.google.com/technology/index.html.

In general, webmasters can improve the rank of their sites by increasing the number of high-quality sites that link to their pages. For more information about improving your site's visibility in the Google search results, we recommend reviewing Google webmaster guidelines. They outline core concepts for maintaining a Google-friendly website.