Some practices that help reduce anxiety may involve breathing exercises or talking things out with others. But just as effective might be actions that involve taking it out - not on people, but on inanimate objects such as hitting a bag, stomping balloons, or going for a walk or run. Sometimes we need something much more active as a form of release to bring us back to ourselves.
Prayer in Motion: Connecting with God in Fidgety Times
Flow: The Psychology of Optimal Experience by Mihaly Csikszentmihalyi
Music: "Reflections" by Wild Wonder