Use your dream journal in to take note of recurring dream elements that were especially strange or out of place.
This can help you to identify personal dream signs which may help you attain lucidity later on. Recognizing that out-of-place thing – your dream sign – can help trigger the realization that you’re dreaming and thus make the shift from a regular dream to a lucid one.
Attention to your dreamworld will be an ever-useful tool for bringing your dreams into clearer focus, even when you are a well experienced lucid dreamer.