When I coach people on interviewing, breaking the word vomit habit is the number one issue *by far*. Work on controlling your nerves. Keep your brain engaged. That is the best tip I can give people on interviewing better.

The other important advice I give people is to stop taking it personally when you don't get hired. I know that's hard to do. But the hard truth is that interviewing is a dysfunctional game. It has very little correlation with your actual value. Just focus on getting past it.