By chanting the mantra Om Namah Shivay, one gets the blessings of Lord Shiva and one attains his company. Lord Shiva himself protects the person from every negativity and brings happiness in his life.
Chanting the mantra Om Namah Shivay brings blessings of Lord Shiva as well as Sun God. One gets blessings from the Sun. Sun God is considered the king of the nine planets. In such a situation, just because the Sun becomes calm, all the other planets also become calm.