Sorry I couldn't answer earlier I went to sleep the tournament is 60 minutes
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Oh and it's a USCF tournament
Someone above said: "Also, while close to the endgame, pick your captured queen up to intimidate your opponent." Oh, please. That's so obnoxious. I saw Akobian do that once in a game with Hikaru Nakamura, and Hikaru said, "What, are you kidding?" Better to leave the mind games alone and focus on the game.
It can't hurt to read up on an opponent -- look at past games, etc. -- but if this is your first tournament, then you're obviously not at the level where lots of your opponents' games are readily available in archives. So...
Play the board and the clock, not the opponent. Don't try to psych him out, and don't let him psych you out. Be a machine.
A couple of folks have mentioned the importance of time management -- that advice can't be taken seriously enough. Manage your time. Try to play your way into openings you know well, so you don't have to waste lots of time in the opening with calculation ... you'll be glad to have that spare time in the midgame. When the opening is pretty much finito, no matter what shape you're in, take a short 20- or 30-second stroll as a breather (preferably on your opponent's time!). Don't look at other games on that stroll -- the point's to clear your head. Then come back to the board, assess the situation, decide on a plan, and start playing to that plan. If a move is decisive, give it as much thought as necessary, within reason. If a move is forced, make it already: you can think about after when after arrives. That's maybe the most important thing to grasp in time management: there are endless possible lines to calculate in virtually any given position (as black you can run out your whole clock sorting out a response to white's first move), but there's only one game that's going to be played, so instead of wasting eons trying to find the perfect move, just find a good move. But of course if a good move suggests itself right off the bat, always ask yourself, "Is there a better move?"
Best of luck!
My problem when I went to my first tournament was that i thought every one there was better then me. Don't let that give to you it destroyed my chess. Only think about the game.