It's important not to make RCs habitual, and instead try to be truly skeptical about whether or not you're dreaming at that particular moment. You don't have skepticism in normal dreams, and it's important to get some in so you can become lucid.

I haven't WILDed in forever, but the first thing I remember about my dreams when I wake up is the visual aspect. Like proxide said, whichever works best for you.