[kellco]

Have you tried joint ventures? Implemented any affiliate marketing programs?

Created content that you can optimize keywords for and good doorway pages? There are many free resources out there online, and I think you just need to read up on the subject that you're stuck on and go from there. Try a few things and test it and see what your results are and improve from there.

[bschiett]

based on experience I can recommend developing content around your ecommerce business and the problems the products you sell are solving, and using that to bring traffic to your site.

of course you still have to spread your content so for that you have to work on twitter, facebook, ... connect with people and help them spread the word about your content.