The Sales Insights Lab Channel is the place for ideas on how to dramatically increase sales!. Marc Wayshak practices a data-driven, science-based approach to selling that utilizes all the best tools available to sales organizations today.. He is also an important contributor to Inc, HubSpot, Fast Company, Entrepreneur Magazine, and Huffington Post Business. . Marc is the best-selling author of three books on sales and leadership, including the highly acclaimed titles Game Plan Selling, The