Contrary to popular belief, Blackjack is not an easy game to play or master, You could learn how to count cards but you'll get kicked out of the casino and possibly banned, like those MIT students from the book Bringing Down the House: The Inside Story of Six MIT Students Who Took Vegas for Millions or the movie "21".
The "book," not the above mentioned book, suggests you do a lot of things under many a circumstance to beat the house. It's rather complicated and if you're the type who learns on the fly, then I suggest you download Blackjack Strategizer for iOS ($1.99).
It'll teach you basic strategy and the touch gestures are the same gestures you'd use at the tables anyway. The app also crunches and displays your statistics in case you're the analytical type. I played it on the plane ride out to Vegas last night and left the tables with an extra $US82.50. [iTunes]