One thing my 7 year old daughter's therapist did that helped a lot was she told her whenever her mind gets going too fast, she needs to close her eyes and picture a stop sign and just take a few deep breaths to calm down. This has helped a LOT with her non-stop talking so fast that nobody can understand her. When she gets going too fast I just tell her to use her stop sign and she closes her eyes and calms down a little. Hope it helps some. Other than that, I'm still trying to figure this all out too lol.