I've personally gotten so much more mileage out of giving up on the idea of perfect speech or avoiding stuttering. I mean, of course I try to not stutter, but I try not to let it become my focus. Instead, I work on being the kind of person who (for lack of a better term) doesn't give a fuck. * Phone call was a trainwreck? Don't give a fuck. The customer service rep just got a mini break. * Food order took 3 minutes? Don't give a fuck. It's my money and my tip. * Conversation attempt went sideways? If I don't give a fuck, they probably won't either. Now to be honest, these are sometimes more aspirational statements than reality, but either way a side effect has been that my speech has improved (or at least I don't hate it as much as I used to).