Maha Shakti Kriya is an excellent and short kundalini kriya for the Navel Center.
Stretch your legs out together in front, sitting up straight. Inhale and slowly raise both legs up to 60°, then exhale as you lower them. Do this 10 times.
After the 10th time, hold the legs up, stretch the arms out parallel to the ground and balance in this position with Breath of Fire for 3 minutes as you look at the toes.
Then inhale, hold and relax.
It is Maha Shakti because Maha means "greatest." Shakti is the energy. This kriya is a simple stimulation of the Navel Center to put you into action and to move you toward completing your goals.
©The Teachings of Yogi Bhajan