This might sound nutty - but it's worked for me several times. As you're falling asleep, calmly think about where you put your it...for some reason that half-dream state seems to work. I once "lost" my wallet for a week...knew for sure i had it when i left my Mom's......Anyway, did this - and it popped into my head that it was under the front seat in the car. Had to jump up, get dressed, run outside --- and there it was. I had no conscious memory of having put it there after using my gas card to fill up. Hope you find it soon !!!