Yeah, problem is that it seems to me to be quite personal. Everyone has his own ways of reducing it or straight up stopping stuttering. I still stutter but I figured out that when I don't fap for more than 3 days straight I stutter waaay less than usual. When I worked out, same thing. I'd say the key thing is to talk a lot with a lot of people in general, in the long run, it will build confidence and reduce stuttering