When I was growing up in Massachusetts, my Dad loved to work on cars. Every time he headed out to the driveway, I was right there with him. One weekend, when I was 10 or so, he told me we were off to fix a transmission. "I can't do that," I said. He replied without a pause, "People do it every day. You can certainly do it once." That straightforward advice -- and the fact that we did fix the transmission -- stuck with me.