What psychological trick do you use when playing OTB?

I'm glad nobody with the last name Peters or something like that ever named their kid Bent.

Ok, I'll stop now. I'll leave. I couldn't help it.

Happened last week on live chess. I offered a draw, opponent ignored, but then immediately offered another one after his move and said "You offered a draw!". I ignored, too, and said "If you make the right move, I'll accept it." He played a move, offered again, but it was not the move I expected, so he went on to lose the game. 

EDIT: Found the game. http://www.chess.com/livechess/game?id=818886203

Bent is actually a quite common name in denmark.

I know it may sound funny outside denmark. I had my name renamed because of it.

GM Bent Larsen was the best chess player in denmark ever.

Check this one out:  In 1998 (yes, I'm letting it go, breathe) at a tournament I was scheduled to play the tourney Director in round 5.  All week I'd prepared for Black (since it was b,w,b,w,b,w) as per format.  I show up and not only had the dude reversed colors (to beat a lower rated player [me] with Black to gain an advantage as to have White in round 6).  Well, I sit down and move and start the clock with everyone else, except he is nowhere to be found.  He strolls in Sixty Five minutes late and resets his clock!  We were still playing after everyone had left and the janitors were cleaning.  He played a Budapest gambit and was mowed down like a lawn in a two pawn advantage endgame.  Alan Gilbert is his name and cheating is his game.  I told him as I left, "Get Bent."

Ivanchuk does that whether its his move or not.

More precisely it's twisting his nose hairs, yes it's true; tie 'em in a braid Chuckster.

I've actually seen him picking his nose (finger right up in it to the elbow!) more than once like he doesn't care he's on camera. Haha, & he knows the whole world is watching.

I attempt to do this all the time in OTB chess but I'm not very good at actually pulling it off! 

Mostly it involves shaking or nodding the head after a move, a sigh, a tut, or I'll look at the opposite side of the board to where I have just made a blunder! 

"Well against teenaged girls, at least, I retract the touch rule.  You see I takes zee pohny and I put it here, zen I let it go and whoa I put it in anuzer spot.  Bwahahaha"

That makes sense for an official game, and I'm not saying it isn't important to notice checks.

But, define a casual game. If I'm playing a coworker over our lunch hour at work, we just say "check" and get on with the game. It's polite that way.

"1.b3"

Sorry, casual is a bit too ambiguous. I'm only talking about blitz games in the park when you have a bunch of people "hovering" and such. 

Ah, that makes sense then.

I had a psychological trick once against some dude doing a continuous 4-board simul in Venice beach in L.A. So he says "so, what's your rating", I say "2250 or so", he says "great, I'm about 2400, should be a good game".

Later on he mutters to himself "2250, huh".

Kasparov takes his watch off when he is about to win.

must be demoralizing to the opponent to see Kasparov take off his watch.

This was apart of his chess 'psychology' so opponents know when to resign.

Just showing up at the board was often unnerving for my male opponents.  But truthfully, the few times I played against a woman, it unnerved me too.

The only psychological trick that ever bothered me was an opponent who simply had the technique of seeming extremely bored at the table. Constant sighing, leaning back lazily, looking away at all the other games and moving very quickly as if everything was obvious to him and my moves were terrible. It was one of my first times playing OTB at my club and I went on to lose pretty badly so it obviously worked.

I've slowly got better at dealing with most small psychological tricks and mainly just focus on moves now.

Over The Board - played in the presense of a living, breathing opponent

Mikhail Tal has a terrible stare. His opponents countered that by wearing reflective sunglasses