The essential resource for painsomniacs pondering whether - and how - to use pot. Until his mid-40s, the only leafy plant material that health journalist David Sharp consumed recreationally was Earl Grey tea. Then chronic pain and insomnia struck. Desperate for relief, he nibbled a brownie made with a special ingredient. No, not walnuts - weed. Sharp's pain soon melted away, and he slept that night like a hibernating bear. Thus...