What's the best way to train for a chess tournament?

I've been playing chess online for about 3 months now, and I noticed I had a somewhat talent for the game. I play in my first over-the-board (In real life) tournament in a couple of days, what's the best way to train, and make sure that I am in peak condition for the day of reckoning. 

Side note: Are you supposed to say checkmate after you checkmate someone, or are you just supposed to shake hands after the mate? Because I know you aren't allowed to talk in tournaments.

Thank you in advance.

When’s the tournament

Because I have a tournament too on Sunday

My tournament's on Saturday rishi

plus it's a youth tournament

Have you tried Real3D on chess.com? It's like playing over the board.

Arrive early. Be sure you are well rested. Don't have a big meal before play. Stay well hydrated, have a water bottle. Keep your blood well oxygenated, take a few deep breaths occasionally. Make sure you understand the time control and have the clock set properly. TDs can help with this or any other questions. If you like coffee that's fine but don't have so much it makes you nervous. Before the game starts, be friendly to your opponent, offer a handshake, ok to chat a little if it seems comfortable, but when the clock starts focus on the board, not your opponent. And the Real3D suggestion is very good. Good luck and have fun!

I would say set realistic expectations. You are most likely not going to win your first tournament and depending on what category you play in (like under 1000) you could get absolutely destroyed. Your rapid rating on chess.com (as of me posting this) is about 865 and that translates to roughly 640 OTB for classical which means in the category of under 1000 you'll be pitted against a lot of people better than you (and that is A-ok). If the time control is very long make sure you have played a game or two at the time control and USE your time. I am just as guilty as the neck bloke who enters a classical tournament starts with 45 minutes on the clock and ends with 40. I would recommend going over common tactics and choosing a handful of openings and sticking with them. All that said you could end up doing very well and that would be amazing for you so best of luck and have fun!

have fun and dont beat urself up over messing up, it happens at every level, and its part of the game!

ive only played 3 tournaments in my yr of playing chess, and i think my record in W/L/D in total is like 4-6-2, so yeah not great. lol but u just gotta focus on enjoying the game

You should declare checkmate and then shake hands

you dont really need to train much, just make sure to play online plenty and do lots of puzzles the way you normally would. I personally say checkmate in OTB tournaments, but its really your choice.

I won the tournament in case anyone is wondering; I went undefeated with 4-0

Congratulations!

Play some otb view games if you have time, Don't overwork yourself the night before the tourney trust in your training and knowledge so far, if you have a favorite opening or position you like to get into maybe look at some of the lines that prevent it in case your opponent plays it.

You say checkmate if you play mate and see that the game is over. If its not checkmate your opponent or the arbiter will say otherwise. Its okay to say it aloud though

If you enjoy tournament play, joining a chess club that meets weekly is a good way to improve your game. Clubs often have running tournaments that are low-key--inexpensive and shorter time controls, no prizes--but the games are still rated. This also helps you get to know some of the people you will play with in tournaments, hear about unpublished tournaments, and learn the culture of the chess community.

POPE3TSJ