I did lots of speech therapy as a young child for several years. And then two multi-week sessions when I was older. Probably one at 13 and one at 17. The speech therapy as a child was, for me, worthless. The therapist would pay me a penny every time I could read a sentence without stuttering. This was in the early 80s. The more intensive therapy when I was older focused on different ways to speak. They included reading aloud into a microphone with a machine that would tell you how "soft" your consonants were. You were supposed to speak with very soft, very elongated initial consonants. I don't really know if that helped in the long run, or if it was ultimately just a "different" coping mechanism. Regardless I preferred that to the face and vocal contortions. The other aspect was walking around stores and interacting with store personnel. We (there were probably 8 or so of us) were each assigned a graduate student who would walk with us and observe. We all descended onto a big shopping mall and just went into stores. We were to introduce ourselves, say that we were a stutterer, and then start a discussion. I'm torn about whether this helped. It did teach me that most people when they know they're talking to a stutterer, will respond better than if they don't know you stutter until you actually stutter. Honestly, for me the best therapy in the long run has been a life well lived. Good relationships and a good career go a long way towards the self-esteem that minimizes my anxiety about stuttering. Unfortunately this has taken decades to achieve!