Start this sadhana on any Monday after 10pm. Have a bath & wear white clothes. Sit facing the north on a white mat. Cover a wooden seat with a white cloth and on it in a plate place a Shiva Yantra. Offer on it rice grains and vermilion. Then mark 16 marks with vermilion on it chanting Om Namah Shivaay. Light a lamp. Then chant one round of Guru Mantra. Next with a white Rudaksh rosary chant 11 round of the Mantra.
Om Aanaand Taandavaay Namah
After that drop the rosary in a river.