I think gulliamo makes a good point.

In terms of what will give you the most protection for time and money spent having the brakes checked on your car and taking a weekend defensive driving course makes a lot more sense than worrying about a campus shooting.

Going for a brisk walk, visiting the gym, generally getting some exercise, and swearing off sweets and white bread are more likely to save your life than anything you might do or plan for dealing with a campus shooting.

That said, this issue has regularly made it into the news and has piqued the interest of a good part of the American public. It also has to be pointed out that many of the same issues and strategies for getting through the unlikely event of a campus shooter also apply to attacks at workplaces, and public spaces like malls.