I think the 'formula' to improve stuttering is to lessen the tensions forced onto your stuttering due to your different neurology and the core of mitigating stuttering is just to lessen the tensions. I gotta advocate 'Gentle Speech', introduced in my last post about it and I have elaborated what it is in that post and I simplified Fenster from <The Usual Suspects> for my elaborations who is typical of speaking with a lisp——very close to Gentle Speech.