Art of dying is not new for us.
“Whatever state of being one remembers when he quits his body, O son of Kunti, that state he will attain without fail.”
This is the art of dying as prescribed in Bhagavad Gita by Lord Himself.
Art of Dying which means that finally when the time of death comes we should have developed so much of detachment from this world, detachment from our achievements, detachment from our position, detachment from our family members, detachment from so many designations we might have, that we remember only Krishna at that time. And if we remember Him, then Krishna is promising that we will attain His divine nature.
Art of dying is a meditation technique where we practice meditation in a way that we train our minds to die in samad