There are many things that can be compensated with advance preparation
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It may sound un believable. But really, among the people who make good sales, especially direct sales. Is a person who has a habit of being shy at all that's because the cares about listening to customers.
In fact, sales work is a job where you have to ask customers problems and offer solution through the company's product. This means that we need to force ourselves to ask customer problem or come to a conclusion about the real problem.
Therefore, it is essential to listen carefully to the customer, and listenning is a shy person's specialty. We need to concentrate on figuring out how to solve our customer's problem rather than talking