Our breath is a bridge between our conscious and unconscious minds. At any moment, we can take control of it and start to influence those deeper parts of ourselves.
One classic technique is the Nadi Shoshana, or "channel cleansing" breath. The index finger and middle finger are placed on the forehead, as if either side of the third eye. Then the thumb and ring finger are used to alternate the nostrils.
By timing our breaths we can quickly settle our passions and our minds, calming them and allowing us to enjoy life a little more.