None of these for me ...... have tried all kinds of speech techniques (quite diligently) for 40 years of my life... nothing stuck, nothing worked more than few days or few weeks. Only thing that definitely works for me to accept that I stutter and NOT try to hide it. Once I'm free to stutter, I get into relaxed mode, then I can speak without any pressure. Less pressure means wayyyyyyyyyyyyyyyy less stutter ... Finally I'm happy