Here's a link to a short video (about 2 minutes) with Kevin Spacey challenging a business audience to stay creative and open-minded.
I particularly like his quote from his old pal and mentor Jack Lemmon: that those who have made it in their chosen field have an obligation to "send the elevator back down" for those who need a little more help.
And then there's this quote. "Avoid those who choose to be negative or cynical, because being negative takes no effort at all -- and must be a rather unsatisfying way to go through your day."
"And while I realize that having a positive attitude won't solve all your problems, it might just annoy enough people along the way to make the effort worthwhile."
Go ahead, click the link. Sounds better when he says it.