There’s a great space for advertising that most people leave barren – the space below their e-mail signature.
When you send out e-mail to your site visitors, subscribers, friends, or whoever, take advantage of that white space at the bottom of the page, and mention a relevant opportunity.
Rather than put in the raw affiliate link, create a redirect, so that the affiliate program you are promoting also has your Web address.
This advertising technique is innocuous, it’s not invasive at all, and it works. Give it a try!