Sri Siksastakam - Eight Instructions of Sri Chaitanya Mahaprabhu...one can chant any of the names of the Lord- the Hare Krishna mantra or Om Namah Shivaye or 'Om' etc.. In this Kaliyuga, chanting and remembering the Lord is the quickest way of purifying the mind and achieving God. If we defer this important task to old age, our minds will not be conditioned or habituated to think of God at that stage, and will be too steeped in material world to change our ways or become spiritual...
Sri Siksastakam - Eight Instructions of Sri Chaitanya Mahaprabhu
.Chaitanya- a medieval saint widely considered to be an avatar of Lord Krishna...that is the glory of all true God-realized saints--they become one with God and gain a status greater than that of God among their followers...they become the face and voice of God on earth...the very thought of the lustre & dust of their lotus feet is enough to grant bhakti, vairagya, and salvation.