Make all your picks before the tournament starts.
Make sure your bracket is complete before the start of the tournament.
Be sure to fill out your entire bracket before the first game. Come back as often as you like to check your progress.
Just make your picks for each game of the tournament.
You can pick who you think is going to win each game of the tournament. So, instead of predicting the entire tournament before it happens you get to pick the winner of each game as it goes along.