I want to go even a step farther with this “positive thinking” thing and talk about how even during specific hands, your attitude affects the outcome.
There is a famous book called “The Power of Positive Thinking”. In it the author (Norman Vincent Peale) suggests that your attitude affects reality around you. Reality does not happen in a vacuum. You actually create reality. In my life experiences, I have come to believe that this is true. And nowhere is it more true than at the poker table.