Look at the tip of the nose with eyes 9/10's closed but also imagine like you have eyes in the back of your skull.   And from the back of the skull you look through your skull look towards the tip of your nose. Breathe as long and deep as you can and before you know it you barely notice the breath coming and going. Posture is elbows tightly to your sides, Palms  up facing towards you. Keep looking from the eyes at the back of the skull to the tip of the nose, being very still and slow the breath even more. This meditation Yogi Bhajan taught for intuition and opening third eye, to be done up to 31 minutes.

I found it easy to quiet the mind by using the eyes in back of the skull. and then i noticed the naad sound and eyes at back of my head were together, very close...like the eyes and sound were in each other. The waterfall sound became more distinct which really alerted me to the quality of this dimension. It was very pure, the sound, this inner fountain.