Controlling the Controllables

There are certain controllables you can control, certain ones that you can't. And before you arrive at the event there are number numerou soy things you can do. So i and for me, what i learnt was that if i can manage to control those bits, the things that ware, that are within my sort of gift affectid to control. It manages to reduce the noise and the stress around either events or things you are going to attend. How do they teach you that in them in the romarine training?