Word of mouth marketing can be very powerful. If you write an article or an eBook, and your readers tell others about it or reference it in their blog posts, you can be an overnight sensation. I also think of this as viral marketing, but David Balter makes the distinction in his new book, The Word of Mouth Manual – Part II. For a limited time you can download a copy of this book here. Read it and see how you can apply the ideas and principles to your business, whether it is online or off. eBooks and other online writing is particularly well-suited to this one-to-one approach. One person reads the information, finds it to be useful and helpful to their problem or situation, and passes the source on to others. This will be considered far more reliable than anything that is written or published. First-hand, word of mouth recommendations and testimonials will always be the best way to promote your product or service to others.