If you are engage in selling, you must have the eye of an eagle, you're friendly, have a good tone of voice, approachable, sensitive to given situation, and most of all adaptable to any situation. But it doesn't mean that if you don't have these traits and qualities, you're not in to selling, because all of these can be acquired and develop, as long as you're ready to learn and earn. Start looking for needs then provide it, be sincere and truth to every transaction, don't tell lies, speak of something that is attainable and never present impossible. Don't push client and customer to buy your product because you need money, but rather explain them their need of buying your product and services, and how essential it is to have it this time.
Let yourself control the conversation, that you must be ready with your outline to have successful presentation. Controlling the conversation doesn't mean you're the one to talk, but it means that you must be able divert and go back to where you want to discuss even the client will be keep on talking. Remember your purpose and fulfill it, you don't have to talk too much, you listen carefully and observe, go with what he