Lucid dreams are dreams where you are aware that you are dreaming. Below is a journal entry about a recent weak lucid dream. More lucid dreaming information can be found in my Lucid Dreaming Archives or from the Lucidity Institute

I was half-awake, half-asleep for a noon nap, and I was fading in and out reality. I became aware of this, and so I tried controlling my dream.
 

First I glanced to the side of my bay window outside and onto the pavement by the construction site. There, the pavement floor transformed into what looked like a mosaic of broken glass designs. This was inconsistent with what the floor was in reality, and so I knew I was dreaming.

Then I embarked on imagining things. The first thought in my mind was that I was a fighter pilot, as I was sitting in a chair with my head against a wall while I was napping. This thought prompted a flight into the mountains. I went through gray cloud upon grey cloud, until I reached the apex of the mountain. Then around the side of the mountain, a cliff opened up like a doorway that led into a wooden enclosure. Inside was sand and dirt, which bored me. I left and curved around to the other the side of the mountain, until I imagined another more interesting destination, a harem room with couch and lady. She never materialized as I was about to wake up at this point. The scene switched back and forth between my dream state and my bedroom.

I gave up and then the dream scene faded to black. That's when I knew I was coming off.

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Lesson:

After having done about ten lucid dreams that lasted less than a couple of seconds, I have learnt to remain calm upon discovering lucidity. In the previous times where I was anxious to do play around, my mind became alert and soon I was back into the real world. This time around, since the novesty of lucid dreaming has worn a bit, I gradually eased my way into dream control.

The nap lasted about ten minutes, but the experience felt like thirty.