There isn't much of a difference between ranking e-commerce sites and info sites. Just make sure you have a proper url structure (for example runningshoes.com/nike/airjordan3retro). Name your categories and products wisely. Have proper title tags and meta tags. Have a short product description, but do not use those provided by the manufacturer. Optimise product images properly (name, alt tag....etc). And build quality links.
Do the URL rewrite with proper keywords.hence the pages are dynamic it will call soon by google.make h1,h2,alt tag optimization also proper meta tags will help you.also do product submission and feed submission.
Treat e-commerce website as the normal site - do all the stuff that you normally do for any other site. Hope this helps...