Some E-books combine very well with an affiliate program. When the affiliate receives some extra benefit from promoting the viral message, like being able to brand your E-book with his affiliate links, the affiliate makes a sale when a reader buys through a branded link. You benefit from increased traffic on your website because the affiliate is willing to promote the E-books for you.
Be absolutely certain that your message includes a clear call to action. There shouldn’t be any doubt whatsoever about what you intend recipients to do. Make sure that the instructions are perfectly clear so that recipients know HOW to act. The action that you require should be simple and obvious as well. Don’t make things complicated or it will confuse the reader, such as by adding numerous links.
