Chanting of the Hare Krishna mantra is the easiest process of meditation in this age.
Srimad Bhagavatam 4.8.53,
Hearing and chanting is the key to fix the mind on Krishna. When we are chanting, we need to just hear the sound vibration.
Sri Chaitanya Mahaprabhu has inaugurated the Hare Krishna Movement, which is not different from Krishna, the Supreme Personality of Godhead. If one associates with this Movement, he directly associates with the Supreme Personality of Godhead. People should take advantage of the chanting of the Hare Krishna mantra and thus gain relief from all the problems created in this age of Kali. — Srimad Bhagavatam, 09.24.56.
Chanting Hare Krishna increases the ocean of transcendental bliss.
The Quest for Enlightment, Chapter 1,
When one is accustomed to inoffensive chanting, then his fruit is that he is promoted to pure love of Godhead or Prema.