Book excerpt: The concept of network marketing is sound: build relationships with like-minded people and sell quality products and services within this network. Some people make amazingly high incomes from their network marketing businesses, while others unexpectedly fall by the wayside. Why do some fail while others prosper? This insightful business guide gives smart, practical tips on how to succeed at network marketing. It explains simple and commonsense ways to treat any network marketing business like a mainstream business. By taking away the mystery, it illustrate.