In this age no process of realizing the Supreme is possible except the chanting of the holy names of Lord Krishna: Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare/ Hare Rama, Hare Rama, Rama Rama, Hare Hare.
The chanting itself purifies us and as the heart becomes purified, the Holy name is revealed to us as being non-different than Lord Krishna.
Caitanya Mahaprabhu has recommended that everyone chant the Hare Krishna mantra just to cleanse the dust from the heart. If the dust of the heart is cleansed away, then one can actually understand the importance of the holy name.
Nectar of Devotion, Chapter 12,
If one wants to achieve success at the end of his life, the process of remembering Krishna is essential. Therefore one should constantly/incessantly chant the Maha Mantra.
By chanting of Hare Krishna, you have the Lord with you and He satisfies you. He pleases you. You are pleased with your Lord. He is also the Lord of your heart.
Even if one distributes ten million cows in charity during an eclipse of the sun, lives at the confluence of the Ganges and Yamuna for millions of years, or gives a mountain of gold in sacrifice to the brahmanas, he does not earn even one hundredth part of the merit derived from chanting Hare Krishna.