The most important aspect of personal PR is developing and sustaining credibility. Trust is not always an obvious commodity nor does it happen overnight. You develop it one day at a time by how you conduct yourself and react. According to a USA Today survey, the primary reason salespersons are effective is not in their popularity or grasp of product knowledge but in their ability to be trusted by their customers. They want to help you succeed.
People respond to and enjoy being around persons who are passionate about their work.
That promotes believability. Consistency in temperament that allows room for flexibility. They want to know what to expect. Willingness to take risks. Have faith in yourself and in your convictions.