There are the little magazines for kids that say that certain dreams mean things. Is that true?
They're visions in the back of your head which portray an image. The very same image that you see when you're awake, only blurrier since all of your other senses have been neutralized.
I think they do mean SOMETHING. Dreams are the embodiment of something that the person thinks about on a daily basis. It creates a more surreal environment for that person to experience their own thoughts.
Yeah, It's called falling asleep. XD
I heard a few online tips about lucid dreams, they can be looked at through a simple google search. I think they're pretty interesting, but a little too out-of-the-way to actually get it working.