I wonder if lucid dreaming is good for getting extra time out of the day. You're asleep, but you do what you want. This would be pretty cool if done properly. I can study, practice martial arts moves that I just don't get, or pretend I'm the Hulk and smash things .

Electronic Device: http://blog.makezine.com/archive/2008/06/how_to_build_a_lucid_drea.html?CMP=OTC-0D6B48984890

Routine: http://www.dreamviews.com/

Lucid Dreaming, yep. That'd be awesome, but the device hardy works. There's a higher probability than say, no device at all but bear in mind that not even that guy has ever archieved one using it.

I've had two lucid dreams in my life. The second one just happened randomly once.

I had the first one on the day I first found out about this idea. I spent most of the day reading up on it, and I guess because I was so focused, it happened that night. After that I tried all the techniques to have them again for about a week, but with no more luck I just gave up.

While they are fun and may give you a chance to practice things in a virtual reality type of environment, I don't think you would really gain a lot of time. Dreams are very short, and the illusion of length we get sometime is just that, like how a movie can give you the impression that events are happening over the course of a year when the movie is only 2 hours long.