The best way to prepare for a restful sleep is to start a practice of nightly prayer where you repeat one hundred times or more the Jesus prayer: “Lord Jesus Christ, Son of God, have mercy on me a sinner.” This prayer, in the tradition of the Church, is one of the most powerful prayers. As you repeat it slowly in your mind, concentrating on the words, you mind shifts its attention away from your problems of the day. You begin to focus on God and seek His help and forgiveness. After you pray in this way, read a passage from the Bible or from the writings of one of the Church Fathers. You are now filling your mind with spiritual thoughts that will replace those you have collected from a hectic day. Then, as you get into bed, begin again to say the Jesus Prayer. Let it put you to sleep.
…If you do experience a bad dream that awakens you, immediately begin to say the Jesus Prayer to bring your mind back to a calm state. Then keep repeating it until you again fall into sleep. After awhile the prayer will automatically begin in your subconscious mind to stop troubling dreams even before you awake.
I’m going to try this… right now…