Enter the City Park.
Fairly open, short, only nine holes, and considered too easy for us "Pros" to play. You've birdied every hole before, just never all of them in the same round. I mean, you can birdie all of them right, you just missed those two putts and ended up -7. You could of made those putts, you could have thrown the perfect round.
Well if you can birdie any of the nine holes, do it, birdie all of them, in the same round, -9 after nine. The perfect round.
It's total consistency, doing everything you are capable of all at once. Now, take this same mindset to the next "real" course you play. If you play the same way you did when you shot -9 at the City Park, you'll have one of the the best rounds you've ever played there.