We all market every moment of every day. We are each walking, talking advertisements for our own brands as well as our employer's. That is why it is so important to represent yourself with the utmost integrity at all times.
Every action no matter how innocuous it might seem will have a definite reaction. In a consumer based business such as the mortgage industry, that has an awfully big black eye--it is mission critical to conduct yourself with professionalism in all of your interactions.
People buy from people they trust. Building that trust might take some time, but if you have a foundation of "do rightness" you will win it. Karma is at play and will impact you in this business for sure. Live a life of doing good and treating people well and you have nothing to worry about!
Be a brand that people want to buy from!