WILD is the best method, this is the only one I've had a lucid dream using, sadly when I had it I was so shocked to find I was in a dream I woke myself up.
Well, if you are like "I have to do 60 reality checks a day so that I will also do it at my dream" you will probably damage your health.
But you are like "Hey, I just remembered to do a RC. It would be good if I did it, and I might lucid dream." nothing bad will happen.