George Lois has been one of my heroes since the days of his great "Esquire" covers, and some years ago I had the pleasure of interviewing him in New York. He's got a brand new book out on "the big idea"--I haven't read it yet, but will come back with a short review when I have.
In the meantime, here's a link to an interesting short (under ten minutes) video interview with him done by Advertising Age: George Lois video interview. Among other things, he talks about his creative influences and the kinds of things he thinks people need to do and see in order to stimulate their own creativity.