Probably no one will be surprised to hear that in order to become a great businessperson, your prospective and current customers must believe you are an expert in the field. If clients don't believe that you're well-versed in the sector, and that they can't trust you with their investment, you'll hardly be able to acquire the necessary amount of customers and meet your targets. Here are six tips on how to come off as an expert (even though you aren't) and how to always look professional.