Bert has posted a list of things you should do in email if you really want to alienate people. My favorite is the fourth one down:
"CC everyone you can imagine, especially their superior
– This is especially good when your recipient has slipped up and made a
mistake. If the mistake is small, do this before you have all the
information so it looks a lot bigger than it really is. This is also
effective when dealing with confidential or sensitive information."
Carbon copy bloat is the #2 contributor to email overload, right behind spam. Take Bert’s tips to heart the next time you start to send an email.