Short term fluency enhancing strategies for emergency situations?

Short term fluency enhancing strategies for emergency situations? Anyone care to share some fluency tips/hacks anyone has used to get through "emergency" situations (not a real emergency, more like having a final presentation to make a specific grade, going to a social event to make a specific connection, etc etc... ?) Could be legit or totally anecdotal and not healthy lol. For example, in an "emergency" situation in college where I was required to present, I got a little buzzed prior to my presentation, which at the time helped me (at least mentally, I probably stuttered the same amount.) Something more recent I've done is mindful meditation the day of. Jury is still out on that one. Share some tricks if you have any!