It depends on the dream. With a certain type of dream, usually, the clock & the reading the book works, but if it doesn't, RCing my bed works just as well, since my bed should be empty, & should there be somebody in there, I then know, & just go read the book anyways, as it will save me some time reading it later when I wake up!!! Right Ramu?

Other than that, I usually don't need to RC to know I am dreaming.