Behavioral economist Dan Ariely, the author of Predictably Irrational, uses classic visual illusions and his own counterintuitive (and sometimes shocking) research findings to show how we’re not as rational as we think when we make decisions. You can watch his fascinating video above (from TED).
I think irrational behavior is something that all the marketers and sales people have to learn and excel. These ideas comes to good marketers intuitively, but sometimes it is hard to explain the teams involved with marketing. Dan Ariely brings a great framework for the decision process, which should be an important part of the sales and marketing teachings.