Testimonials...The Single Most Powerful Marketing Tool Ever Discovered! © Copyright 1988/2005 Thom Reece All Rights Reserved Among the variety of techniques available to you as a marketer, there is one that is virtually guaranteed to increase your business...testimonials ! To clearly understand why testimonials are so powerful we must first look at the basic perceptions of our audience. Here's how "John Q. Customer" might describe his attitude: "In addition to making me an enticing offer,.