I've noticed that when I wake up in the middle of the night (Not on purpose, though) after a dream, and then fall back asleep, I always remember at least one dream and have a very high chance of having a lucid dream. This has been 100% true this week. The two nights I didn't accidentally wake up I remembered nothing and I'm certain I didn't have any lucid dreams. Every other night I had at least one lucid dream after waking up. I think just waking up in general has some effect on lucid dreaming but I don't know why.