Check out the 9 tips given by Adam
www.searchengineland.com/9-tasty-tips-for-ecommerce-seos-26730
Additionally here are a few other tricks I think would work.
- Product Categorization: One might say that this is more of a site navigation features, but makign sure the products you are featuring on your site are well categorized is very important. This will help you get targetted traffic and the user could be pointed directly to the correct category page within your e-commerce site, thus ensuring that the user doesnt leave the site struggling with the navigation having to make a few more clicks from the home page to the specific category pages to find what they are looking for.
- Bubble up your ratings/reviews: If you have ratings and reviews for your products on your site, make sure they are featured well enough to be featured on the SERP. Users love seeing a 5 star against a search result before clicking on it
- Make sure you have trackbacks from famous review sites or related sites.