You have to win pretty much every all-in situation you are in and that's it!
You won the tournament
There is no magic wand you can wave to win. the above advice is about the best you will ever receive. If you want to do well in tournaments, which is a completely different goal, you have to have patience, play smart, and as always, you'll need luck. To use a baseball analogy, a hitting coach once said try to hit the ball hard and square, and sometimes it's outtahere.Play really well and get really lucky. You need to do both to win large tournaments.