The 25 Most Common Sales Mistakes and How to Avoid Them

“25 Sales Mistakes is essential for any professional or organization committed to sales excellence.” - Michael A. Berman, Chief Operating Officer, Outside Ventures”

Bestselling author Stephan Schiffman founded D.E.I. Management Group in 1979 and has since led his company to become one of the nation’s fastest growing sales training companies. A leader in motivational and sales training, he is a certified management consultant who has trained and consulted with a wide range of international corporations, including IBM, AT&T, Motorola, Sprint, and CIGNA. Schiffman has written over 50 books, which have sold well over six million copies internationally and have guided generations of salespeople through their career challenges. His articles are published frequently in publications such as The Wall Street Journal, The New York Times, Sales and Marketing Management, Personal Selling Power, Corporate Travel Magazine, and INC. magazine. Mr. Schiffman divides his time between managing D.E.I., selling, training, consulting, and product development. He continues to serve as a frequent guest on national radio and television shows, including CNBC’s Smart Money, Minding Your Business, Steals and Deals, and Money Talk.

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