To focus and calm by mind, I use the following mantras:
There is no past. There is no future. There is only “now”.
I will not be concerned with that which I cannot change in the past, or that I cannot predict in the future. My only control is over this moment.
I control my thoughts, actions and reactions, all else is out of my control.
My beliefs and values are my own, and I am responsible for developing and shaping them as I grow and learn throughout life.