[jb9]

Be really really aggressive, especially when first to act.

Don't be afraid to try to steal your opponent's big blind with a weak hand (unless you have a read on him that he will *never* fold).

If your opponent has been pushing you around, you will have to either push back or trap him. Raise or fold -- almost never call unless you are trapping.

Lower your starting hand requirements considerably. I would play any Ace, King, pocket pair, or 2 cards higher than 9 very aggressively heads up at the end of a tournament.

Don't be afraid to lose. Luck is going to be a huge factor in deciding who wins, and since you can't control that, you shouldn't worry about it or get upset by it.