I did a special course and I stuttered only 6 times in the last two months. I talked a lot and did a lot of things to challenge myself, like ordering food, making phone calls and approaching strangers. First weeks went great but now I begin to get the anxiety of speaking back. They claim that they will fix my stutter so hey, lets hope. If you're interested, the course is called Del Ferro and is held in Amsterdam, Netherlands. I did a 10 day course but there is also a 5 day course. If you REALLY hate your stuttering, maybe it could be your next vacation ;)