In 3 years of LD practice, the nose-plug RC has never failed me once. I don't really need RCs much anymore, but that one is particularly effective. Also, definitely try to break the "I'm awake" habit. In fact, saying you're dreaming doesn't work well either, because in your waking world, you know it isn't true, and that assumption carries into the dream. You have to base things on the impossible RCs.