I found the exercise very difficult - or my concentration "not so good". It's easy to let your thoughts wonder. BUT I managed to mentally play 3 first holes and today I played them for real.

Mental image and realism did not meet. It had a good round, but it was nothing like my mental image.

This just means that I need more mental training and more rounds to play. I'll try to do the exercise of 3 holes at least once a week - maybe even more often. I know how to practice muscles - but what is the dose for mental training - how often is the best frequency?