Maha Mantra

Hare Krishna Hare Krishna
Krishna Krishna Hare Hare
Hare Rama Hare Rama
Rama Rama Hare Hare

Lord Caitanya and the Vedas both recommend this process:

hare krishna hare krishna
krishna krishna hare hare
hare rama hare rama
rama rama hare hare
iti sodasakam namnam
kali-kalmasa-nasanam
natah parataropayah
sarva-vedesu drsyate

The sixteen words of the Hare Krishna mantra are especially meant for counteracting the contaminating influence of the age of Kali. After searching through all the Vedic literature, one cannot find a better method.

The Hare Krishna maha-mantra is a very simple mantra consisting of only three words: Hare, Krishna, and Rama. Hare means unto Mother Hara (i.e. Lord Krishna's personal pleasure potency, Srimati Radharani).

Krishna means the all-attractive Lord. Rama means the source of all enjoyment.

When we chant Hare Krishna we are praying: "O energy of the Lord (Hare), O Lord (Krishna and Rama) please engage me in Your service!" Maha-mantra means it is the Great Mantra Of Deliverance.