Selling 101: What Every Successful Sales Professional Needs to KnowSelling 101 Here in a short, compact and concise format is the basics of how to persuade more people more effectively, more ethically, and more often. Ziglar draws from his fundamental selling experiences and shows that while the fundamentals of selling may remain constant, sales people must continue learning, living, and looking: learning from the past without living there; living in the present by seizing each vital moment of every single day; and