One thing that really helped me is looking people in the eye. Even if you're stuttering your face off. I promise it helps tremendously. At first, you might have to look someone in the eye and deliberately stutter, just to get used to the feeling. I was in a program and they made us do that with a store clerk and stutter deliberately. I still remember the image of the guys face looking me at me back, dead in the eye. It was pretty important for me I think.