What Advice Do You Have for People Who Get Nervous?

When people tend to get nervous oftentimes, they start to ramble. And so what advice do you have for people who have that tendency when they're in a high stakes conversation? I mean, it really comes down to some level of preparation, some level of experience and what you're going to be talking about or what you're dealing with. And then some level of confidence and ability in yourself to just stick to what you know.