Just spread the word about your commerce website, Create backlinks for your commerce website from various other popular website. Submit article to ghttp://www.goarticle.net/ Good luck!
A commerce site might be a little harder, but direcctory would be one of the best ways. Also if possible, try setting up two way links with other commerce websites that might compliment your website.
Bookmark your various category pages with Anchor Text, Write article (about your products or Compare products) and submit.