After each move, you must stand up abruptly and stare down your opponent with this face (O_O). On move 10, stand up once more, but this time with a straight face, just stare them down for a few seconds and then state, "You may as well resign". At this point you just have to walk away and get something to drink. When you return, the opponent will have tipped their King. You have my guarantee.
Psychology

On move 10, stand up once more, but this time with a straight face, just stare them down for a few seconds and then state, "You may as well resign". At this point you just have to walk away and get something to drink. When you return, the opponent will have tipped their King. You have my guarantee.
The only guarantee for this is that a complaint will be made to the TD.
"The World of Chess" contains a very humorous section on coffeehouse chess which lists a variety of psychological tactics, none of which, I am sure, you'd be able to get away with in a tournament.
The only effective tactic I know of in tournament play is making good moves.

LOLZ!! I am in the NJ states for High School, so I know this. Don't take my youth lightly. This one technique has proven well: After you make your move, put your hands over your eyes and stare at your opponent. Not angrily or any other emotion. Don't smile or do anything. Don't laugh. Just stare, and your opponent will get a bit creeped out and make a mistake. Other than that, you just have to play well.
I know chess is strategy, but what are some Psychological tactics that I can use in my games? I have the state championships coming up in five days. Thanks!
Useful psychology that I use in OTB tournaments: It's obviously helpful to take a walk, get a drink, etc. but it's a very useful psychological tactic to not at any point in the whole game stand up from the board. It makes your opponent think you're more determined then they are. Another tactic I use is that I never ever accept any draw offers unless:
a) my position is clearly disadvantageous.
b) there is no way to escape an obvious draw.
Another thing is to choose your opening by looking at your opponent before the game. If you're playing someone young, play a really boring variation, they won't be able to stand it. If you're playing something old, try something that the theory is very new on, or a sharp position (and so on and so forth). I'm not sure if these actually do help... but I use them and I think they do Good luck in the tournament! Hope this helps
I'm not much on playing up the Psychological element of chess... I straight focus on the board, play chess, and I can usually care less about my opponent.
To make my post useful in some way, let me leave you with some little trick... After your move, just look up into your opponents eyes, either with an intimidating, piercing stare, or just a calm sort of glazed look. This has been known to put the occasional player off his / her game.

I'm not sure what you guys are talking about looking at your opponent with a scary face or something, after a 5 hour OTB game I'm lucky if I can pick out my opponent the next day, I think I look at their face once, when I first sit down and shake hands, after that I don't look up except to walk around. If you take time to stare at someone it seems like you're breaking your own concentration.

Hey guys, I think there are plenty of psychology strategy you can enploy using your peices.
I always make notes about my opponnents tendencies. Many times I notice players who don't exchange a knight for my bishop, and I might make a move putting my bishop up for trade, which I normally would not, but because I know he won't make the best move, the trade, I get away with a large positional advantage.
If you opponnet is afraid of anything, find a way to exploit that fear. Bring that fear up as much as possible. If your opponnet is trying to keep the game closed, open it up. Make him unconfortable.
If possible, look at a game your opponnet has played before you play him.
Of course this psychological play becomes much less important the higher up you play.
And remember, always look for the stalemate when losing.

There is a well known "psychological aspect" in choosing an opening that we all have heard about it: choose an opening/defense (or any kind of play) that will make your opponent feel uncomfortable. For example, if he doesn't like the French, play the French. I just know now that I have underestimated the truth behind this. Next time I will try to make use of this.
Next tip: If you don't know your opponent, ask him how to use the clock. Act as if you are a begineer :)

put a captured piece behind the clock, turn your own knights backwards, set pieces on the edges of the squares, smile or frown at inappropriate times

You people are funny. You think you can scare you opponent by making faces? Doctor the pieces so "something doesn't feel right"? Please. I've done things that are much more stressful than playing a game of chess, and I'll wager your opponent has too. If you stare at me like a mental patient, I'll laugh at you. The idea that school yard bully tactics would intimidate me would make me more determined to beat you. If you start putting your boogers on the pieces and I inform the TD, all the other players will know. Do you really want to be known as "booger boy"? Study and play good moves.
I know chess is strategy, but what are some Psychological tactics that I can use in my games? I have the state championships coming up in five days. Thanks!