Your last word worries me, because I've seen insomnia and it's a killer. Like you I often have trouble shutting off my mind, causing me to continue working on p

Your last word worries me, because I've seen insomnia and it's a killer. Like you I often have trouble shutting off my mind, causing me to continue working on problems in my mind while I'm supposed to sleep. Sometimes productive, but you will crash in the end, especially as you get older. When it gets really bad I force myself to sit down & meditate. When I do that for a few days I know I can find a healthy rhythm again. Heartpain, headaches & stress-induced illness are not worth any perceived productivity gain. Learn to shut down your mind.