For me, the only thing that worked was desensitization through voluntary stuttering. 3-4 easy repetitions on words where i would not stutter normally. With time i managed to apply it to real stuttering moments as well. Of course my stuttering will never go away 100%, but it reduces my stuttering a lot. I actually started with this as part of a stuttering program for my son, and then discovered it had a huge effect on me as well🙂 Practising techniques to hide the stutter had no effect in real life situations for me, and i spent years going to diffdrent SLPs when i was younger.