Not looking at this from a wiccan standpoint, (because I don't really know anything about lucid dreaming) I think that keeping a dream journal is a great idea.
It's a great way to find out about what's going on in your subconscious mind. I do believe that some dreams are meant to be signs or warnings, but not all of them are. I think that thinking about your dreams critically is a good way to find out more about why you make the choices you do and how to make better ones.
I would start a dream journal, but I don't really remember a lot of my dreams.
(Sorry I couldn't really be of much help or anything. :/ It happens.)
Do you have any tips on how to remember the dreams I have? I normally forget them by the time I open my eyes. (Not always, mind you, but normally.)
Follow your heart. I never believed that should happen until it actually needed to happen. Now it's all I do. Love.