It is a useful strategy for maintaining resilience toward stress during difficult times.
Close your eyes and focusing on "breathing in peace and breathing out stress." Let your belly expand and contract with your breath--if you find your shoulders rising and falling, you are likely carrying tension in your body and not breathing in the most relaxed way.
Begin to envision yourself in the midst of the most relaxing environment you can imagine. It can be imagining yourself playing your favorite sport or you can be you sitting down reading your favorite book. Then begin to ask yourself these questions:
Stay there for as long as you would like and when you feel as if you are done count back from 20. The goal is to return to a state of feeling serene and refreshed.