Bhuchari mudra
The gaze into the void
✓ Assume the seated meditation posture in front of a white wall (with your eyes looking at the wall).
✓ Place the thumb of your right hand between your nose and upper lip.
✓ Stare at your little finger.
✓ After a short while, lower your hand and continue to look at the place where the little finger had been.
✓ Concentrate as long as possible on this spot and think of nothing else.
Effect
Promotes memory and concentration and calms the mind.