Ruth P. Stevens consults on customer acquisition and retention, teaches marketing at business schools in the U.S. and abroad, and is a guest blogger at Biznology and Target Marketing Magazine. Crain's BtoB magazine named Ruth one of the 100 Most Influential People in Business Marketing. Her newest book is B2B Data-Driven Marketing: Sources, Uses, Results. Ruth has held senior marketing positions at Time Warner, Ziff-Davis, and IBM and holds an MBA from Columbia University. Learn more at www.ruthstevens.com.