At least his lucid dreams techniques are not that difficult to reproduce. I stopped them many years ago after I had strange experience of waking up for several times in a row. I woke up, went to a next room and, all of a sudden, I realised that it was still a dream. After short panic I woked up again only to repeat the story. And so on, actually I'm not sure if I've really woked up that day or I'm still in that dream…
That's such a profound experience! Do you have a reference for learning those techniques?
Lucid dreaming itself is a researched subject and there are a lot of material on that but the simplest techniques as keeping a dream journal (writing what you dreamt about each morning) so the mind recognizes that it's important to be aware of dreams and testing if you are dreaming. When you are reading this comment do you think you are dreaming? How do you know? Contrary to usual thinking dream world is quite different from "normal" world. For example you can block you nose and mount in a dream and not suffocate. Or turn on a light, in a dream it won't be as fast as in real world.
Usually sleeping during the day also triggers lucid dreams. One way or another it's a skill one can learn given some time and practice.
[0]: https://www.amazon.com/Exploring-World-Dreaming-Stephen-LaBe...