Sit in any meditative asana [[asanas]] like padmasana, sukhasana, siddhasana or swastikasana. Using your hand fix a point 4 to 5 inches from the tip of the nose. Removes the hand and concentrate on the point.
This is Bhoochari Mudra.
Along with this one can perform jnana mudra, dhyana mudra which will give greater benefit. This mudra can be performed for 5-10 minutes everyday.