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Among the first things you notice when you step into the corner office of Harvard University professor Joanna Aizenberg are the playthings. Behind her desk sit a sand dollar, an azure butterfly mounted in a box, a plastic stand with long fibers that erupt in color when a switch is pulled, and haphazard rows of toys. Especially numerous are the Rubik’s cubes--the classic three-by-three, of course, but also ones with four, five, six and even seven mini cubes along each edge.

Each day, Inc.'s reporters scour the Web for the most important and interesting news to entrepreneurs.

CBS News correspondent Armen Keteyian reports on the problems caused by lack of sleep. Then, Erica Hill talks to Dr. Jennifer Ashton and Adam Bryant, author of "The Corner Office," about the conflicts between healthy sleep and a successful career.