I find that it is very profitable to act like a regular joe schmo at the table. Be friendly, polite, show a couple of your great hands every now and then to assure people ("GREAT FOLD THERE MAN!"). Once youve built this table image, of a predictable, tight/cautious player, I find that your fold equity (correct application?) on bluffs and other marginal hands becomes MUCH higher. If people think youre just having a rush of hands, theyll stay away from you, even if youre raising the button with rags. Even loud, obnoxious, unpredictable "know-it-alls" are cautious against a friendly guy who just seems to be getting all the luck.

My first post!