What I've come to notice is that another clear difference between experiencing Waking Reality and experiencing Dreaming Reality is that, usually, There generally is a higher frequency of Stressfull and Exciting situations in Dreaming Reality.

Even if we dream about plain things, such as being at school in the classroom, being at home on the coutch talking with a friend... These experiences are still percieved alot more exciting/Stressfull/Impressive/Pronounced in Dreaming Reality than in Waking Reality. It is because of the general surrealistic wierdness of Dreams where we percieve & experience in altered, unusual ways. I don't know about your Dreams people, but I can not remember a single Dream I had that was dull and had no element of excitement/emotional value to it.

Maybe you can use Stress/Excitement as a Dreamsign. Whenever you experience significant Stress or Excitement you do an RC?
Anyone wants to Try?