Selling more is a sign of growth. But to sell more, it is necessary to apply fundamental principles to yourself and your teams. You must first put at the center the one who must become your source of income, the customer, and therefore convince him to buy your product rather than that of the competitors. Selling is and must be the concern of every manager. It is the essential activity and does not suffer any laxity or procrastination. There is no need to put off contacts with customers until tomorrow. But to do so, you must use the toolbox that leads you to develop your sales.