If you are ever in a situation where you want to share sensitive information with a journalist, the most important rule (after calling a PR person to help you) is to set very clear ground rules about attribution before the conversation starts.
By allowing the White House to approve quotations -- which Michael Lewis has admitted to doing for his Vanity Fair piece -- he is surrendering some of his independence as a journalist in exchange for access.
The cardinal rule of journalism is simple: Get it right or don't report it, especially when it comes to matters of life and death. But during live coverage of the shooting in Tucson this weekend, the media got it wrong over and over again.
One critic wrote that my film Nothing but the Truth, a thriller about how far a journalist will go to protect a source, goes "off the liberal rails." However, the fight to get a shield law is itself a non-partisan battle.