I love this short interview from the New York Times with Jerry Seinfeld, about how he came up with one of his bits. I find his retelling of the creative process as funny as the actual delivery of the same material.
Buster Keaton was one of the biggest stars in the early days of Hollywood. His fame was eclipsed by Charlie Chaplin, his comic rival of the silent film era. But his knack for physical comedy and performing his own (often dangerous) stunts was unparalleled in cinema history.