What you describe is basically the root of the MILD technique described by S Laberge in EWLD. You might save yourself some time by doing a little more reading so you don't have to re-invent the wheel.
http://www.lucidity.com/LucidDreamingFAQ2.html#mild
(lucidity.com has lots of stuff)
http://www.consciousdreaming.com/lucid-dreaming/how-to-lucid-dream.htm
http://members.aol.com/Aarenka/vision.html
Later ------------- CloudHelmut