A friend of mine told me that about a year ago or so, he simply would wake up every morning and write a big letter A on the palm of his left hand to indicate that he was awake.

He explains that he does this in the morning so its on his hand the whole day, and whenever he notices it, he tells himself, "Oh, I guess I'm awake." His rationale is that in a dream, he would not have that "A" on his hand and thus realizes that he is dreaming.

After doing this for a while, he now says that he has a lucid dream every other night and no longer needs to write the "A" on his hand. Let's assume he's telling the truth. Could this simplified version of the RC actually work? Flaws/suggestions?

Note: Currently I am thinking about lucid dreaming so much that about every hour I will see if I can put my finger through my hand or fly. When it doesn't work, I conclude I'm awake.