My mind races but analyze: should I try cognitive shuffling? Map the technique: random visual imagery that occupies mind without engaging it. Calculate: if I visualized random objects instead of worrying, would sleep come faster? Show me the shuffle protocol: how to generate random images, what to do when mind wanders. Give me the implementation: this is how to practice the technique. Include: whether this works better than counting sheep, how to do it correctly, and when it's most effective.