How to play Blackjack? Which is played in the recent movie "21". and plz giv me some tricks also.?

the goal is to get as close to 21 by adding up ur cards without going over. ur ace can ethier b counted as a eleven or a simple one depending on what u need in ur hand.face cards r all counted as 10. and if u get a face card and a ace u automatically win that is considered a black jack.