One of the oldest cliches in the golf advice book is to play one shot at a time. It is great advice, but how do you do it? There never seems to be an explanation to go with the advice.
As you are only capable of attending to one thought, or point of focus at a time, then you need to be directing your attention to the thing which is going to serve your golfing purpose best. This video clip explains a routine you can use which will ensure you are correctly focussed to play each shot.