The first book I read on lucid dreaming 23 years ago also said to go to bed early. I had my first lucid dream the same night that I read that small, short book. It was another two years before I had my second lucid dream with that book's instructions. I agree it helps at times to boost dream vividness and possible lucidity.

I have been testing a new method to induce lucidity for a month now and the results have been very good and I am in the process of writing a comprehensive tutuorial. To describe it personally my experimental method is like MILD on steroids...