It's about a year since I took a defensive driving class, and I've had no tickets since then. I also stopped wearing my make up in the car - attempting to multitask while driving. And I almost never touch my phone. Let's just say that the 'almost' bit covers really rare Foursquare check-ins, and Shazams. I have also slept more this year, and have greatly reduced my chances of being a human hazard on wheels.
Knowledge is good!