The Buddha urged us to prepare for death, to prepare for that journey by cleansing the mind and not being so attached to things, to be able to let go and release ourselves for needing to be, from needing to have. Through this we will not suffer so much as we pass through the final stage of the present life, we can let go, be grateful for what we had but not clutch to it, not try to ensure permanency and cause ourselves to suffer more than we need to. This way we can end the cycle and leave forever, obtaining nirvana and release from the cycle of death and rebirth.