How to know if you should worry

From Bruce Schneier’s “Should Terrorism be Reported in the News?” in Crypto-Gram (15 May 2005):

One of the things I routinely tell people is that if it’s in the news, don’t worry about it. By definition, “news” means that it hardly ever happens. If a risk is in the news, then it’s probably not worth worrying about. When something is no longer reported — automobile deaths, domestic violence — when it’s so common that it’s not news, then you should start worrying.