This book is one of my favorites. Stephen LaBerge teaches techniques that work very well for me to become aware of dreaming.
He also teaches how to use the skill for problem solving and creativity.
One of the techniques for becoming aware is to ask yourself during the day if you are dreaming and look for dream signs, which makes you ask yourself that same question while dreaming and helps realize that you are dreaming, at which point you can do anything. I guess that is where the electric current comes in handy because you are not used to it during your waking hours so when you experience it, it makes you realize you must be asleep, which means you can be or do anything you could ever want.
One of the coolest things for me is to fly to new strange cities.