Those who remember me at the time of death will come to me. Do not doubt this. Whatever occupies the mind at the time of death determines the destiny of the dying; always they will tend toward that state of being. Therefore, remember me at all times.... Remembering me at the time of death, close down the doors of the senses and place the mind in the heart. Then, while absorbed in meditation, focus all energy upwards towards the head. Repeating in this state the divine Name, the syllable OM that represents the changeless Brahman, you will go forth from the body and attain the supreme goal.

(The Bhagavat Gita)