You hear that number and you go, 'That had to hurt at certain points.'" Seinfeld offered his keys to long-term marital success. A big one is just rolling along. "They say, 'Knowledge is power ...

Considered perhaps the best sitcom in U.S. television history, "Seinfeld" certainly found a way to write and deliver jokes with a great cast of regular and guest actors. What were some keys to the ...