I would say that small wins help a lot, they break the vicious cycle of "I can't do this because I don't have the confidence" and "I don't have the confidence because I don't do this". This vicious cycle has been in my life for a long, long time and it is paralysing and really toxic. Small wins, no matter how insignificant at first, can really make a difference and break this cycle. I can give one good example of a small win that really boosted me when I was a kid. I went to a foreign country with my dad, on a vacation. We took a boat trip to some islands for sight seeing. The boat was really big and there were other people. I sat at a table on one corner of the boat and at the other corner was a pretty girl with her family. I was getting pretty sea-sick and I was looking at her because it was kinda comforting and I did not want to look at the moving scenery. She looked back at me for the whole trip. There were even signs from her that she wanted me to come and introduce myself but I was too afraid to do it, because of my stutter. The trip was nearly over and I haven't done anything. So, I made the decision to just "Fuck it, I'm going in". As you would expect it went horrible. I stuttered the whole conversation and it was very bad. I even forgot her name and her fb because I was too much in my own head. However, to this day, I see it a small win because I had the guts to move past my fear and do something that I wanted. So, to summarize, small wins are the holy grail to any improvement (especially in stuttering) and specifically for stuttering, just a little bit of courage to go against your fear and maybe masochism, haha. Wish you the best of luck man, if you want a fellow to talk to, pm me anytime.