I know for some people here this might be an unpopular comment; but I joined the McGuire Programme two years ago and it helped me tremendously, as it did many many other people who I meet in the program. I am not totally fluent now, but the bad, bad blocks where you really can't get a word out is something I have not experienced for a long time now. I can say what I want now with confidence, and even if I have a dysfluency I do not let it affect me in a negative way (like the shame, guilt, isolating feeling that we all know). Instead, I am very open nowadays to everyone I meet about my stutter, such that I have nothing to hide.