"Worry does not empty tomorrow of its sorrow; it empties today of its strength."
Corrie Ten Boom
Being consumed about issues tomorrow will steal away the only thing that matters, how and what you will do productively today.
The success of your life and business is simple math. Everyday of productive activity is like a penny that goes into the bucket of your accumulative success. Worry robs you of putting that penny in the bucket.
Focus on today. Do your best today. Do that everyday. Than worry will never have a hold on your life.