Right of Living
By natural arrangement, every one is supplied their food & shelter by the Lord, so nobody should encroach upon the right of living of others.
Becoming Perfect
If by the tongue you chant Hare Krishna mantra and by the tongue you taste prasadam, you will be perfect, simply by executing these two things.
Grace of The Spiritual Master
By the grace of the spiritual master the cloud of the mercy of the Personality of Godhead is brought in, and then only, when the rains of Krishna consciousness fall, can the fire of material existence be extinguished.
Srimad Bhagavatam 3.21.17,
Srila Prabhupada.
Reaching Krishna
One can reach Krishna only by practicing devotion.