It is important to be responsible. It is important to "take care of our own business". But it is important to avoid being so caught up in "I" and "me" and forget that life is meant to be a TEAM sport where we help others and where we are concerned about others as much as ourselves. In a PERFECT world, we understand that "when we take care of God's business", which is primarily taking care of others and their business, "God will always take care of our business", and usually much better than what we would ever do.
Lord, help me to remember that worrying will accomplish nothing, while helping others and seeking God will in the end, take care of all of my worries, in one way or another.