The basic idea is you train yourself to recognize when something is off. You hold your nose keep your mouth closed and then try to breathe so like this. The more I do it the more lucid dreams I have but if I was being really disciplined I would have done it right when I got on this podcast that's what I usually do with new people or no. If you've seen inception they're constantly spent in the tops of their dream homes trying to check if it's a dream, he says.