The document discusses key concepts in sales and customer retention. It defines selling as controlling and influencing the decision-making process to get the client to decide in your favor. Successful selling involves understanding the client's needs, both conscious and unconscious, their problems and motivations. The best salespeople are skilled communicators who listen well and ask questions to understand the client's situation and lead them to see the product or service as the solution. Customer retention involves developing strong relationships and moving the client up the perception ladder from simply renewing prescriptions to seeing you as a business partner.