--1 white candle--
---a glass bowl filled with scented flower petals---
At night time, or whenever you have peace and quiet, with no disturbance from others, light the candle, and place it next to the bowl of petals.
Lie on the bed, close your eyes, and think back to when you were little, then go further and further, until you slowly remember
how you felt when you were inside your mother's womb. Then slowly go further, and remember how you flew through the tunnel of light from the heaven, and back again to Earth.
See your silver cord (the cord which attached you to your past life's body) re-heal, and you are back into the person's body in the coffin, or even perhaps, into the ashes, which then reunite to
form your past life's body again.
Slowly, when your unconscious state takes over, you'll remember who you were in your past life - maybe not right away, but you should eventually see yourself, or remember your name or those you loved.
Remember, this can take a lot of practice and a lot of patience. Don't do it if you are unwilling to devote at least one hour to it.