I have a couple of websites that I built myself that I am using to market affiliate products.  I have read almost every guide available on affiliate marketing and search engine optimization.  I thought I was implementing proper seo techniques but I have a feeling I have made some mistakes.  The sites get almost no traffic from the organic listings and I have had to rely on pay per click advertising to get any traffic to the sites.  This is getting expensive and time consuming and I think it would be a good idea to hire an experienced search engine optimization specialist to take a look at my sites.