"Therefore, let the morrow take thought for the things of itself."
Doctrine and Covenants 84:84
This is cool, and what it says to me is .... focus on where you are, and who you are interacting with in the moment... be present, physically and mentally. Participate actively and focus on where you are and what you need to do right now. Don’t worry about tomorrow. Of course, I am in no way saying that we should lose our eternal perspective, forget that there IS a tomorrow, and an eternity... only that we have a chance to do good *today,* and we shouldn't lose that chance by fretting over what might happen tomorrow. Let’s keep our focus on the people and things that we are blessed with today. In addition... if we trust God a little, and know that he is working to make our future as bright as possible... maybe we could relax a little and enjoy today. :)