heads up strategy

[Mariogs379]

hey
does anyone here have a "system" or basic guidelines for NL heads up play with an ante of 1 instead of a blind and starting with 50 in chips?
im starting to play this more and more and i wanted to know how to get better and tweak my strategy...im usually tight and agressive in a full game but i need tips on which hands to play and how to adjust?
also, the structure i was talkin about is tourney style, not heads up cash game
any ideas would be very helpful