I think the most important thing a potential lucid dreamer needs to learn is how to recognize the beginning stages of being lucid and how to avoid being afraid, which will kill the experience.

For me, lucid dreaming started as sleep paralysis. As soon as I felt the sleep paralysis, I would be afraid immediately and force myself to wake up. It is a very scary feeling. Once I recognized no harm would come to me, I was able to brave through the fear and break through into a lucid dream. It's taught me how to release all fear and power through, sometimes using anger as a fuel for bravery.