Many business people believe that their success is solely dependent on their product and services. What I have learned through my experience is that what is going on outside of the organisation also matters. I think positive emotions are consistently associated with better performance, quality and customer service, and this is true, irrelevant of the industry or roles within the organisation.
Try adding the following words to your vocabulary:

I can
I will
I know
I believe
I dream
I am confident
All things are possible