With your finger draw an infinity sign (a figure eight laying on its side) in the air.  Make it big.  Keep your hand going in this motion continuously.

As you draw the infinity sign (keep it big), follow it with your eyes. This forces your brain to switch back and forth between left side and right side thinking.

The switching disrupts focus and instantly breaks stress.  While this doesn’t represent permanent relief, it will help you break out of the most stressful moments.