There are a small amount of people who have only lucid dreams, they can control every aspect of it and every dream they have is a lucid dream.
I don't know why, I don't do anything that it says in your guide, and I am a lucid dreamer...
Lucid dreamers are often born around one in a million people, and I'm not saying that only these people can have lucid dreams, it's possible for people to have lucid dreams without doing any of this too, it's just HIGHLY and AMAZINGLY unlikely. These tips heighten your chances of having a lucid dream by A LOT.