Nadi Shodhana / Alternate nostril breathing is the most important breathing technique to help keep the mind calm, happy and peaceful. It will help release accumulated tension and fatigue. Nadi Shodhana calms the mind as it clears out blocked energy channels in the body. If you have only time for one Pranayama / breathing technique, practice this one.
(nadi = subtle energy channel; shodhan = cleaning, purification; pranayama = breathing technique).
Part of the Ten days of Pranayama program