"Hare Krishna, Hare Krishna, Krishna, Krishna, Hare, Hare; Hare Rama, Hare Rama, Rama, Rama, Hare, Hare."
This video contains 54 Repetitions to help you learn this mantra (japa), repeat again for 108 repetitions = 1 mala or 1 round)
Why chant it? Click this link for benefits:
http://www.jswami.info/WhyChant
Do your best to chant with devotion and faith and have patience. Pray to Him to help. Do right actions each day and everything else in moderation. Deal with any present discomforts, knowing the undesirable karma that created such is being burned up, and trust in Him to lead you to true and lasting Bliss.