Go on, tell me the best way, YOU get people to your site and buy, what's the best conversion rate you've got? How many visitors do you have a week?
Im still trying to figure that out. I thought it was by posting in forums and whatnot, but that simply isnt the case. There has to be a type of advertising campaign that has to be done and once it is, then you will see more people to your site.
Try writing relevant article to article directories and put a link to your sales page on the article...