Simply put - don't worry about tomorrow.
We plan. Planning is an organized ritual which provides for a well directed day. Planning relieves the stress about what is to come. We plan for parties, school, dates, weddings and the like. Having a solid plan makes the event (or just the next day) run smoothly. In all of our plans, we include a time for a relationship with God.
We worry. Worrying is a waste of time and energy. It accomplishes nothing. We become consumed with fear and forget to trust in God. Worrying is an interference in our relationship with God.
If we don't worry about tomorrow, we will have time for God today!
