Today it's time to throw away (or put in God's hands) one thing you are worried about that you can't do anything about on this very day. If you have anxiety about lots of things, pick one. Then tell God just for today that He can handle it -- or if you don't beleve He exists, simply throw it away for the day. If the thought comes back into your mind, refuse to dwell on it.
In fact, pick one positive thing you can replace it with. Get how it goes? Replace the anxiety with a positive thought just for today and see how it goes.