You could quite easily use this technique when your child is in bed, before your usual bedtime. It would be an interesting thing to try in the evening when you'

You could quite easily use this technique when your child is in bed, before your usual bedtime. It would be an interesting thing to try in the evening when you're stuck on a coding problem. It's only really useful if you can get to that stage of N1 sleep quite quickly anyway so it wouldn't apply to all people. I don't think it's the domain of childless millionaires.