Advice for being "that yong punk"

[A_PLUS]

This forum has quite a few very talented young players, so hopefully someone can give something good.

I am playing in a 200$ 50 player MTT with a friend from work next week. It is a regular game, with extremely succesful businessmen, at a country club. Now, although I am somewhat accomplished in the finance field, I am 27, and I look like I am 21. I KNOW these guys are going to see me as a young punk outsider (probably even an internet player!!!) who thinks he is going to run over their game.

Im not asking for playing strategy in the "you should tighten up early on sense". More meta-game, psychological type ploys. Anyone have any anecdotes from similar situations?