Here are the things that threw me on my first fight. Good luck with yours!

- I had not been to the gym I was fighting at. It was incredibly hot with no AC. Combined with my gear, it was pretty intense. See if you can get a feel for conditions.
- I made the mistake of cutting water weight to make my goal at the weigh in. Don't do this!

Definitely get some rest before the fight. No heavy contact sparring for around a week, or however long it take you to recover from things like accidental kicks to your opponent's knee. I see a lot of guys listening to headphones and tuning everything out right before the fight. I haven't tried it myself, but whatever can help you get in the zone is a good idea.

If you're comfortable with it, be the aggressor out gate. It will set the mood for the fight. Remember to kick THROUGH and not at your target. Don't hold back. Stay focused and look for openings. Listen to your corner person. Knock their f-ing head off.

Exciting! I don't do muay thai, but I box so maybe there are similarities in prepping for a fight?

What helps me the most before a fight is to remember that the day or, even the week before, is not going to make that much of a difference - obviously you don't want to not work out or eat like crap - but don't kill yourself the week or two before. Everything you need to do well in your match, you learn in the weeks and months (and years depending on who you are) before you compete. No good coach is going to put you into a fight unless you are really ready, so hopefully you have confidence that your coach knows what they're doing

Remember - everything you need to know, you already do, just go in there and have fun with what you've already learned!