Choose one...

Breathing
As the triangle expands, breathe in.
As the triangle collapses, breathe out.

Take deep breathe through your stomach.
In through your nose, out through your mouth.

Meditation
Meditation reduces stress, improves concentration, increases self awareness, improves metabolism, and improves brain functioning.

Body Relaxation
Performing relaxation techniques daily can lower your baseline level of stress: strengthening your ability to handle stressful situations.

5, 4, 3, 2, 1
Focusing on your senses can help you stay in the present moment.

Music / Sounds
"Weightless" by Macaroni Union

This song was created in collaboration with sound therapists in order to decrease anxiety. 
Studies have shown that "Weightless" helps to slow heart rate, reduce blood pressure, and lower levels of cortisol.