I did speech therapy I went to HCRI actually which specializes in stutters. I find that the tools they taught me can be found online. I found them to be helpful in that environment, however I find their tools to be fairly unrealistic for everyday use. The emphasize breathing, and the two tools they taught us were: Stretch Syllable and Amplitude Contour. Stretch syllable is basically pronouncing each letter in that word such that you can hear and feel all the syllables. And amplitude contour is kinda like singing-- for example, you breath in and then you began to speak in a flowy, "wavy" voice so that you pretty much say everything in one breath, and then that repeats. I do not practice these as much, however even when I did I feel as if I didnt always use them. Sometimes they helped sometimes they didnt. The main reason I say it didnt help me personally is because while I have these tools, I still experience random waves of anxiety when talking to someone new so it is hard to regulate my breathing. Additionally, some people are genuinely impatient, so they will cut you off if they think you are done talking. In my therapy environment these tools were great considering I was with other fellow stutters. But outside of that setting it can be difficult to utilize these tools because of the anxiety, impatience of others, and other things that may trigger your stutter. But it is always worth giving it a go! Best of luck!