Trying to convince someone to buy your product or service is more than just about putting in the basics of persuasion. Persuasion encompasses a variety of communication and trust-building skills to bring people around to your way of thinking. Learning how to convince people in sales starts with, on a very simple level, building a relationship with that person. Starting a relationship with somebody who doesn’t believe they need your product or service is tough, and this is where some of the following tactics and techniques can ensure that you build that relationship.