So basically as far as I know, everyone has different individual techniques that don't work for everyone, but one thing that worked for every stutterer I have ever met, is clenching your fist at every syllable of every word. This forces you to slow down and gives your speech a rhythm... I changed a lot of lives with this "secret" technique no one ever talks about (my grandpa was also a stutterer and he got this technique from a soviet speech therapist) I urge you to try it, but you have to practice for a bit before being able to apply this technique efficiently in your every day life. Hope it works for you as well as it's been working for me for years now