Whilst in an old prune age when my body will go no more, I will spend months developing an extremely long and puzzling scavenger hunt (ala da vinci code).  My last words will be the first clue to the riddle starting the very long puzzle. I will have ridiculous amounts of steps through out the puzzle, some stretching for European travel. Each clue and answer will be witty, interesting, and related to my life and my virtues. Only at the end, my kids or what ever will find a final note, summarizing the the journey and all that jazz, including my final words. ok haha there you have it! An assured way to die with a smile on your face.