Try to get a lot of blackjacks and bet a lot....

but seriously there is a lot of theory on BJ tournaments. Almost as much as poker tournaments depending on some of the rules. For example the ones I have been in will move a button from player to player to determine your betting in order. you may be smaller or bigger depending on the other players.

Also, some of the methods of play you see in regular tournaments may differ from live games. For example, you might want to split tens more often against a 2-3-4-5-6 to try to get more money in play.

wizardofodds.com/ask-the-wizard/blackjack/