Zebrah's right, I've been going through the motions and made a habit of that. But I tried a bunch of RC's and none of them are appropriate for the dream scape. Or at least, are reliable. Like looking at digital clocks or complex patterns. I've never noticed a clock in my dreams. Most of the time I'm never near one. As for complex patterns, I don't know, I don't think the "idea" has ever arisen in a dream. Although I was doing that RC for a while, mixed with the clocks, fingering my hand, and nose-plugging.

The two times I did the nose-plugging RC in a dream, I became mostly lucid, but I also because aware of my own chest, my actual breathing, and the feeling of the bed against my chest/torso and thus woke up, ripped from the dream.