I'm a non-owner with a very specific question about Autopilot. I'm an attentive driver. Even late at night, even if I've had a glass of wine at dinner, I never nod off. But then again, I've always had to actually drive. What do you do to stave off dozing? Cycles of turning autopilot on and off? Set a smartphone alarm to chirp loudly every 3 minutes? What? I'm not asking for general staying-awake tips. Just wondering how much of an issue this is with Autopilot (particularly late), and how owners deal with it.