When you chant Shiva mantra, your body should be still. Your spine, neck and head should be erect and your body should not be moving at all. You can begin by whispering the chant. Mantra is a sound vibration which will bring alterations in your brain and in the energy field of your body. By chanting Om Namaha Shivaya, you are not pleasing Lord Shiva but you are using this particular sound wave to create a state of mind...