I get lucid dreams now and again, without even doing these steps.
But within them, I am concious, but not sure if it's a dream or real life. From now on I'll try to do the clock/hands thingy. Also, one time i was dreaming that i was getting attacked by some sort of devil and i started screaming. Turns out i was also screaming in real life.
PS. What if there aren't any clocks nearby, and if I don't have any hands in the dream?