Viparita Karani Mudra

This Viparita Karani word means Sanskrit inverted. One has to lie down relaxed. Gradually raise both the legs and the hips. Support the waist with hands more or less in Sarvanga Asan pose.
By tis practice, the positons of the Sun and Moon are reversed. Hence it is called Viparita Karani.
It is the opinion of yoga masters that sun dwells in the navel and moon in Sahasrara. The nectar that flows from the moon is consumed by the fire at the navel. This leads to decay and death. But by the constant practice of this mudra the nectar of the moon is perserved.

Duration recommended is a few minutes to start with but can be gradually increased to two hours or more. After a few weeks the face shines with spiritual lustre, wrinkles are removed, eyes become healthier, and digestion becomes keen.

Yoga Mudra

The perfect way of practising yoga mudra is to be in the lotus first. But it is not easy and everyone cannot do it initially.

How to do: sit in Padmasana-the right foot placed on the left thigh with the sole facing up and the left foot on the right thigh. Keep both the knees well on the ground, the body bent forward without raising the hips form the seat and the forehead back, holding the left wrist in the right hand. Inhale through both the nostrils and perform Jalandhar Bandha (pressing the chin against the chest0. Hold the heels with your hands.
Slowly bend down until the head touches the ground. Then release the Jalandhar Bandha(chin-lock) and exhale. One may bend down without the chin-lock slowly exhaling the breath. Hold the breath, and inhale.
The duration may be about 10 seconds to a minute.
Benefits : This mudra improves memory, gets rid of excess fat(loose weight mudra), awakens Kundalini Shakti and tones the nervous system.

Shambhavi Mudra

How to do : The practitioner should sit in Padmasana or Sidhasana with eyes steady looking in the void and keeping the mind focused in the heart. One should practice not to wink before this. He has to forget the body and the surroundings and let the mind merge in silence.
Benefits : By dong Shambhavi mudra one has more and more peace come unto him.

Unmani Mudra

This Unmani mudra can be practiced by only those who have reached a higher state in yoga.
How to do : In this one has to sit in Padmasana or Sidhasana with the eyes half open. Then he has to fix mind on the space just a few inches from the eyes. Meditate upon the Self that is formless, nameless and Infinite, without any thought in mind and mind in calm meditation.
Benefits : This gives peace of mind and unfolds inner glories of the Spirit through Samadhi.