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10 Work Lessons You Can Learn from Mad Men

10 Do's & Don'ts Gleaned from the 1960s Office Environment

6. Don't Undermine Your Colleagues

One night, Don happened upon some of Ginsberg's ideas for the Pepsi Sno Ball campaign, and, suddenly feeling competitive, drafted his own rival idea. But on the day of the pitch, he left Ginsberg's work behind in the taxi, presenting only his own ideas to the client. He sold the concept, but earned the scorn of his former disciple and most of the viewing audience.

Uncool, Don. Uncool.