Appearance. If you want to be taken seriously by your customers you must dress aptly for business. If your office culture is to dress in formal business attire, you must wear a jacket and tie at all times. On the other hand, if your industry dictates a t-shirt and jeans, you would look pretty silly dressed in a tuxedo. By wearing appropriate attire for your line of business, ensures that your customers will take you seriously.
Promptness. The easiest way to exhibit professionalism is to consistently be punctual. Day after day, one must arrive at the office on time, ready to work. This feat alone speaks volumes to managers, peers, and customers, demonstrating the individual’s seriousness regarding her work. Excessive sluggishness can be a put-off. A professional who is regularly late for appointments gives the impression that she does not respect the value of other people’s time.
Decorum. We must apply decorum in our communication with our clients and customers. It’s imperative that you keep your initial greetings professional and limit the use of slang and keep it as professional as possible. Also, put off all electronic devices as you don't want your phone ringing and interrupting the flow of a business meeting.
Preparation. It's important to be prompt and demonstrates great capacity to conduct the business at hand. Ensure all the resources such as reports, sales brochures, and other documents are readily available for use. Be sure you have a well-outlined objective for every meeting. This can be accomplished by conducting a research to find out who will be in the room and what their goals are and what you hope to accomplish. Also, it is important to come prepared with questions to ask, but not with the aim of dominating the entire question and answer section. Leave room for others to have a say as well.
Email Communication. In communicating with colleagues and clients by email, a professional should use the same greetings and salutations she would use in typical correspondence. "Dear," "hello," "please," "thank you" and "Regards" go a long way in making n impression in the receiver’s mind. Additionally, never type emails in all capital letters, as this is akin to yelling at someone.