safe computing, what should I cover?

For hospital IS week next month, I'm writing a brochure on practicing
safe computing. I've written sections on spam, phishing, social
hacking/engineering and 419 scams. What else should I cover, that I can
do 2 to 3 paragraphs on?

The theory is that if we get them into using good habits at home, we're
less likely to have problems with them at work. Will it work? I don't
know. But it is at least worth a try.

Don't go around saying the world owes you a living. The world owes you
nothing. It was here first. ~Mark Twain