This method involves the body falling asleep best done when you are going to bed. You need something to focus on, if it is in view the moon, the stars, a crystal or a favourite doll will work well. Use whatever you like.
Some use a candle for this technique, I would advise against it as you will be leaving the lit candle unattended.
Place the object within your view and lie down in your bed. Just stare at the object as you doze off. The first few times may be frustrating. You may just fall asleep and that's it. Most fail the first few tries but don't lose faith and it will eventually pay off.
Keep staring at the object. As your eyelids become heavy, keep staring. Eventually your eyes will close, but you will still be able to see the object. You will still be staring at the object, sit up or stand up and don't be surprised to see your physical body sleeping peacefully in your bed.