I try and learn from my mistakes behind the wheel so I become a better driver. This usually ends up with me crashing a lot. I also try and learn from what my friends do while they're driving, and that's actually quite helpful.
When I'm driving, I don't notice all the little things I always do wrong, the little distractions and ticks and whatever. When my friends are driving and I'm riding along, everything is so, so, so noticeable. That's what J. Walter Weatherman found out (as he said in my post on ten ways to become a more considerate driver) when he broke his leg and had to ride shotgun for a while.