I don’t know if this is already a thing, but rhythm REALLY HELPS.

I don’t know if this is already a thing, but rhythm REALLY HELPS. If you can somehow apply a tempo to your words (for me, I tap things rhythmically or tap my fingers) it’s a LOT easier to talk smoothly. I think this has to do with viewing sentences cohesively, not as individual words. (This is crucial; sounds which may be hard starting a sentence with are easier when in the middle of one.)