Close your eyes for one minute and focus your mind on some calming cue, for example, a place that you go to relax... a beach... the mountains... and hold that image three times to the count of three. It will reduce your blood pressure and lower your heart rate.
Deep breathing has a direct calming effect on the nervous system. Put your tongue on the roof of your mouth just behind your front teeth. Breathe in slowly through you nose to the count of five. Hold your breath to the count of seven. Exhale slowly and audibly through pursed lips to the count of eight.
Imagine your body as a balloon that slowly inflates and slowly deflates. Keep this image in your mind to get the maximum benefits from this breathing technique. Close your eyes and breathe in slowly and deeply through your nose. Hold your breath for 3 seconds. Slowly exhale through your mouth like you’re blowing a thin wisp of air until you have no more air in your lungs to breathe out. Repeat as many times as needed to calm yourself down.