Prepare for the worst, then live for the best.
Many people are prepared, but most depend too much on the authorities to take care of them. You'd think we would learn from the past, like from Katrina. And that was only very localized. Besides natural disasters and terrorism etc., there is still the danger of economic trouble. Many nations, including the U.S., are trying to get out of financial trouble by printing more money, which is part of the problem in the first place. So be prepared for hyper-inflation as well. It's best to prepare for the worst, then be at peace and live for the best. It's like an insurance policy, except you have something to show for your money. For a good non-fanatical overview on preparedness, see www.one-stop-survival-guide.com
Craig