-The induction technique your describing sounds like your trying to WILD. -------> http://www.dreamviews.com/f12/how-wild-62282/ <------ Is a great tutorial on this.
-Lucid dreams can last anywhere from 5 seconds to an hour, this comes with control, and when you become lucid. If your in a lucid dream and you feel yourself starting to wake up (Blurry vision, loss of control, stuff disappearing) you can prepare for a DEILD, for this technique I recommend reading -----> Dream Reentry Tutorial - Dreamviews Lucid Dreaming Community & Resource <-------
-In a lucid dream you have complete freedom to do ANYTHING you want to do, but the first thing that should always be done at the beginning of a lucid dream is stabilizing the dream for that I recommend reading ------> http://www.dreamviews.com/f14/my-tut...ours-ld-94752/ <------

-If you have any more questions feel free to post them, I will do my best to help out.
-Good luck!