THE SALES PERFORMANCE PUZZLE - How to Solve it. In this 9 minute video, Gerhard Gschwandtner and bestselling author John Doerr discuss why most sales training doesn't work and offer proven concepts that will help sales leaders create a highly effective sales organization. Collaborate online using or hit "reply" below to share your insights. Download your PPT slides or a PDF to present this content in your company. This is a commercial free service for SalesOpShop members. Click on any image below to play the video.