I worked in a boiler-room type place once, while in college. I learned a lot from listening to these slick salesmen (some well past the sleazy stage) working t

I worked in a boiler-room type place once, while in college. I learned a lot from listening to these slick salesmen (some well past the sleazy stage) working to extricate money from old retired people. Think Glengarry Glen Ross. I can see a lot of the principles they used listed here. One really obvious one, #12. They made a game with each other of being able to answer any question with a question.