Oprah has done such a great job with this concept. She literally has thousands of "followers" who rush out to buy her recommendations because mailing list she has such loyal fans that she has built strong emotional equity with. 2. Forum Marketing This is an oldie but goodie. Forum marketing is still proven to be a fantastic way to get people to visit your site. The key is providing useful information in the forums.
When you do this, people will view you as an authority figure on the subject and will naturally want more from you. By including a link to mailing list your website in your signature (this is found usually at the bottom of your post window and can be customized by editing your profile information), you give those hungry users a way to learn more about the subject.
Of course it goes without saying that you should tailor your signature links for each forum so the link they are clicking is relevant to the mailing list topic of the forum. A secret to getting the most traffic out of the forums is to give your very best information. Don't hold anything back and you will gain tons of free traffic and build your reputation as the expert on the subject.