Hari means the cosmic ocean or integrated consciousness. It is also seed mantra or name of lord Narayan, the supreme soul. Chanting Hari Om makes you get integrated well with the cosmic ocean i.e. with all other fellow humans, other beings and whole cosmos. Chanting Hariom brings involuntary changes in your consciousness and in your life. Effortlessly you will find changes happening in you.
Om is bindu or the point of consciousness and when it gets integrated with the cosmic consciousness you will start feeling the merger of yours with the cosmos. The journey just begins there but, the journey further demands various spiritual practices, discipline in life, devotion and surrendering to Guru which brings lot of improvement in life, knowing the purpose of your life, detachment and further out of Manthan Kundalni Kriya Yoga, will start and happen involuntarily in you. Then you will start experiencing prosperity in all aspects of life.