To a point you can even use this tip in real life. Yesterday the first couple rounds i played where in the mid to high 70's, however last night after a little bit of substance, I was killin it. Maybe its just for me, but even though its just a game, I stress. If I hit a bad shot or play bad, I get annoyed like in real life, cause im tryin to win here.
So have a couple beers, smoke a bowl, whatever it is you do. Just have a little, relax some, and watch how much lower the score goes when you arent so worried about your score