When I was 15 years old, I was so eager to learn how to drive that there were times I would close my eyes every night before I slept and imagined myself behind the wheel of my dad's car.  I would imagine everything he taught me.  Pressing on the breaks, I'd check my rear and side view mirrors, change the gears from "P" to "D", ease my feet off the breaks and gently onto the gas pedal.   I envisioned driving down the road alongside the other cars, and flipping on the signal lights to make left or right turns.  After a while, I imagined my excellent driving skills so often that when I finally got behind the wheel to take my driver's test, I felt like an experienced driver.  I can only remember my father supervising my driving efforts no more than three times.  But, I imagined driving that car over 30 times in my mind.  I can proudly tell you that I passed my driver's test with skillful ease.  It seemed as if every turn and parking technique that played out in my mind happened during that driving test.