Changes to your game for Tourney Play

I believe I've read before that there are specific strategy changes you should make for tourney play, however I'm having an issue scrounging those up, wherever I previously read them. What are some of the typical changes made to how you bet/play for aiming to win in blackjack tournaments? I'm assuming at least more aggression.

I don't know if this counts as "official" advice, but, I sometimes will split tens and nines, and double-down on soft 20, etc.

A lot depends on how big my stack is, and how many hands remain.

I figured splitting tens could make sense, if the dealer is showing 5,6 or the count is hugely positive. You double 8s against lower show dealer up cards too?

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