Educause has an excellent page with links to video and kits for awareness flyers.

Indiana University, for example, has some funny security slogans that were part of a prepackaged awareness kit:

Protect your password – “Invasion of the Password Snatchers”
“Beware of Worms and Viruses”
“Beware of the Phishing Scam”
Be careful when downloading or clicking – “The Thing from the Internet”
Keep your computer free of spyware – “Beware the Eye of the Spy”

Eye of the Spy? Spooky. Nothing like fear and humor to get people thinking.