Between the 8.5-horsepower thrill of clearing my driveway with my new snow thrower and the excitement of the Eagles' win on Sunday came the sad news of the death of Johnny Carson. Johnny Carson gone? It's like a treasure has vanished. Or an old friend. Carson: "If I ever catch kleptomaniac Claude Cooper from Cleveland who copped my clean copper clappers kept in the closet ..." Webb: "Yes?" Carson: "I'll clobber him." If you don't get this stuff, skip it. There's something more important to Carson's legacy than faded one-liners: He knew when to walk away. Carson had the sense...