Do not be forwarding chain hoaxes cause they may contain a virus. Also remember to reread an email before you send it just in case. Another thing is use proper spelling, grammar and punctuation. Don't be using the caps lock cause can be really annoying and it is just plain rude. Don't send spam to other people cause it could mess up their email system. Try not to use abbreviations or emoticons cause people could get annoyed. Plus, don't send any unnecessary files cause they could be filled with spam and viruses.