Stack, MBA, CSP, CPAE, is an award-winning keynote speaker, bestselling author, and noted authority on productivity. Stack is the president of the Productivity Pro, Inc., whose clients include Wells Fargo, Cisco Systems, Merrill Lynch, and Bank of America. She has been featured on the CBS Early Show, on CNN, and in the New York Times. Stack is a past president of the National Speakers Association and was inducted into its Speaker Hall of Fame.