I've heard a lot about people, getting lucid by DCs telling them that they're dreaming. Would it be possible to talk to your subconsciousness, while lucid dreaming, and ask it to make sure that, in every dream you have, there will be a DC to tell you that you're dreaming?
Or maybe you could tell your subconsciousness that from now on, when you say the word "(insert special word here)", right before you go to sleep, you will get lucid?

Would any of this be possible, somehow?