Here is a basic list of things to do. - First, find a niche for your site and select a group of keywords. (proper keyword selection is essential and cannot be stressed enough) - Next, find link partners to backlink to your website. (links back to your website from high PR pages RELATED to your site are especially useful.) Now on to optimizing your osCommerce store. - Make sure your title tag as well as alt tags contain your selected keywords. - Make sure you have a sitemap that will help Google and other search engines spider your page. - Make sure to always have fresh content. These are just the basics, I cannot guarantee your site will increase in popularity but following these basic steps will certainly point your site in the right direction.