There are a number of Yoga practices that can help to stimulate and balance the Ajna Chakra. These practices include physical Yoga postures, pranayama exercises and chanting the bija mantra of this chakra, "Aum." Because the very essence of the energy that creates, sustains and dissolves physical reality resides in the Ajna Chakra, chanting this primordial seed mantra will re-calibrate this energy center, so that it is balanced and healthy. If you chant Aum while holding your gaze in Shambhavi Mudra, the effect of your practice will be much stronger. Shambhavi Mudra simply means to hold your gaze at the point directly between your eyebrows in an unremitting fashion.