puttnfool got it. Totally doable, but it takes a little patience.
I read another book one time that talked about concentrating only on things you can control, and not thinking about things that are out of your control. For example, you can control your tempo, your balance, your aim, which clubs you choose and what type of shoot you try to hit, but you can't control the temperature, the wind, bad bounces, bumps on the green, etc. On the list of things you can't control was your score.
The idea is that a good score comes from careful planning and thoughtful execution of each shot, rather than from trying to score well, if that makes sense.
The book advocated a planning box and a playing box. Standing behind an approach shot you are in the planning box. You are gauging the distance, the wind, the elevation change, the location of hazards and the pin, etc, and planning your shot. It encourages the golfer to plan very specifically, thinking, for example, "for this shot I'm going to take a six iron, aim at that tall pine in the distance, and allow the wind to move it slightly left, landing it 20 feet right off the pin position." Then, when you step into the playing box, no further planning takes place. You just play. You just swing the club and hit the ball. No second-guessing the plan is allowed.
Lather, rinse, repeat, regardless of the outcome of said shot. I think it's pretty sound advice.