Here is another method, contradicting the first one...
"Before the stroke of midnight, sit in front of a mirror in a room
lit only by one candle or the moon. Go into the silence, and ask a
question. Cut the apple into nine pieces. With your back to the
mirror, eat eight of the pieces, then throw the ninth over your
left shoulder. Turn your head to look over the same shoulder, and
you will see and in image or symbol in the mirror that will tell
you your answer.
(When you look in the mirror, let your focus go "soft," and allow
the patterns made by the moon or candlelight and shadows to suggest
forms, symbols and other dreamlike images that speak to your
intuition.) "