Passage from Beginners Guide To Lucid Dreaming –
What is Lucid Dreaming? What is Lucid Dreaming? What is Lucid Dreaming? Lucid dreaming is basically dreaming while being aware that you are dreaming. If you are in a lucid dream, you will usually have some power over your dream — anything from being able to fly or making an object or room appear behind a door or inside a pocket, right up to being able to change into animals and create a whole world! It is like being a director of your own movie. Lucid dreams have been scientifically proven to exist.
Stephen LaBerge of The Lucidity Institute (http://www.lucidity.com) used a special machine to track eye movements during a dream (these are linked to your eye movements within the dream). He asked lucid dreamers to point their eyes left and right in quick succession and this movement was recorded on the machine. For more information on this and other experiments, read Exploring the World of Lucid Dreaming.
There are plenty of reasons you might want to lucidly dream:
Simply for fun! Just flying in a lucid dream is an exhilarating feeling. Lucid dreams are generally far more intense and vivid than most non-lucid dreams. You can use a lucid dream to wind down after a long day. A major part of “training” for lucid dreams is improving your dream recall, that is, how many dreams you can remember. If you are particularly interested in dreams — either in spirituality or in psychology — trying lucid dreaming could help you in your research.
If you’re writing fiction or even creating a world for a computer game, lucid dreaming can help you visualize it. You could ask your characters how they feel about something or what they think will happen. Some people compose music in their lucid dreams. Lucid dreams can be realistic enough to rehearse a speech or musical performance. You can relive previous dreams or experiences. They can help in dream interpretation and communicating with your subconscious.