Answer:
Try saying one long word to yourself, such as Mississippi, or a short phrase.
Step-by-step explanation:
It can help, as it allows the brain to engage with what you want to say. Plus, it can, in a way, help you with speaking as, in a nutshell, you've basically spoken to yourself, which links to speaking to others. If all else fails, then just read through your script to yourself (that is, of course, if you have one)!