That's a great technique. Another great tip is calling people by their first name because that's their favourite sound to their ear as it is for you to hear your name (although I obviously understand the potential limit to this as you may find it hard to say their name). Look the fact is that the 'halo effect' exists in which humans make a snap judgement about the character of a person based on their appearance. I once went to a cognitive behavioural social anxiety session and said to them why I was there, I said I stutter and I suffer psychologically from it and one of the reactions from the group members was that she pretty much paused the meeting and made an announcement that she thought I was a courageous young man. But, there was another time where I stuttered infront of a stranger at school and she pretty much rolled her eyes and ignored me for the whole two years thereafter. The reality, is that some people will judge you as less valuable for many reasons and one might be your stutter. What I would suggest, is working everyday on developing your own opinions so that no matter how your message comes out, the idea of the message is something to admire.