Rules 1-2 in Netiquette.
Using correct communication while online.
Rule number 1.
Avoid writing e-mails or posting messages in blogs. Don't use all capitals because it looks like your shouting. Not only that its difficult to read.
Rule number 2.
Rule Number 2.
When you talk with someone, the tone and inflections of your voice convey great meaning. To add personality and humor to your messages, use smileys, also known as emoticons, expressions you create using the characters on your keyboard.