The author's most important marketing principle is to thoroughly understand the specific customer known as the "N=1." By understanding why this customer is loyal, and what factors led to this loyalty, it is possible to present these same factors to other customers and encourage them to become loyal as well. Marketing without this customer focus will always result in suboptimal outcomes. In addition to a strong "product idea" (i.e. uniqueness and utility), successful marketing also requires early awareness-building among target customers. Many top brands are actually latecomers to their category, but they were able to gain market share because they were able to create awareness quickly. Finally, it is important to remember that the reasons why customers become loyal (and continue to be loyal) may be different from the reasons why they initially tried the product. Therefore, it is important to understand not only what "idea" the customer responded to, but also how they perceive the uniqueness and utility of