Method of the devotional Shiv Mantra Sadhana:
1] Start from the first day of the month of Shravan. It starts on 3rd of August this year and ends on 1st September.
2] On all the 30 days of Shravan Maas, one must take their bath in the Brahma Muhurat.
3] After bath, go to a Shivaalay and offer some Rice, Chandan, Raw Milk mixed with Pure Water, Belva Patra, Kaner flowers, etc. to the Shivling. Light a desi Ghee Diya. Use an Earthen Diya for the same purpose if you are a Brahmin, you must know that you cannot touch the Shivling unless you have worn a Yagyopavit.
4] Then, Sit on a red cloth Aasan facing the north or east direction.
5] Mentally, Do your Guru Pujan, Ganesh Pujan, Adi shakti/Gauri Puja, Rama Puja and Shiv Puja
6] Recite 54 rosaries * 3 times a day during the entire Shraavan Month.
Viniyog: || अस्य श्री शिवपंचाक्षरी मन्त्रस्य, वामदेव ऋषिः, पंक्तिश छन्दः, ईशानो देवता, ॐ बीजं, नमः शक्तिः, शिवायेति कीलकम, चतुर्विध पुरुषार्थ सिद्धयर्थे (or मम सर्व अभीष्ट सिद्धयर्थे) जपे विनियोगः ||
Mantra: ||ॐ नमः शिवाय ||
Another Shiva Mantra for the same purpose:
This Mantra gets Siddh after completing 1 lakh Mantra Chants. Followed by Dashansh Yagya. This Shiva Mantra is especially effective for getting 16 different kinds of wealth.
Though it gets Siddh by completing only 1 lakh Mantra Chants, what one can do is to complete 1 lakh chants within the initial 7 days by chanting 162 rosaries daily, do Dashansh Yagna and then still recite 31-51 rosaries daily for full success in life. As I am unable to provide its Viniyog, one must recite Amogh Shiv Kavach before doing the Mantra Japa
Mantra: || ह्रीं ॐ नमः शिवाय ह्रीं ||