There are so many ways to market your service or product on the internet.  One of the best ways I have found is being active in forums which apply to your company.  If your are a regular and people know you and your advertise your product or service in your forum signature it is very likely that people will not only click on it to visit your site but visit your webpage and buy.  Some of the best quality traffic I recieve comes from clicks from my forum signatures.  So it just proves you should advertise your site everywhere in e-mail, on icq, and on forums!