What stuttering programs has helped you gain fluency and also become a better public speaker in the work enviroment?

What stuttering programs has helped you gain fluency and also become a better public speaker in the work enviroment? I don't just want to be fluent. I also want to be a great public speaker due to the nature of my career. I want to be able to speak better and sway clients when in meetings. I want to be able to own a board room meeting? What programs really worked for you?