As Phil Blackmar talked about, the mental game is everything. If you are concerned about your opponents, you might as well go home.
Here, I'm using a couple of wedges to practice with. Knowing what shots you are going to use before they happen gives you a massive advantage in play.
Knowing the pace of your greens is one of the best things you can do to practice for a tournament. This will arm you with an advantage for not just putting, but chipping as well.
Golf is a game of tasks. Prepare for a tournament by knowing what tasks to assign yourself. Here is what I'm working on.