1: Prevent virus outbreaks and spam
2: Avoid phishing attacks
3: Manage your Inbox
4: Compose professional messages
5: Write effective subject lines
6: Properly use CC and BCC
7: Obey etiquette rules when forwarding messages
8: Don't be a party to a flame war
9: Protect e-mail addresses
10: Be smart about handling attachments
11: Don't include sensitive or potentially embarrassing information
12: Know when to use e-mail (and when not to)