Netiquette

Netiquette, or network etiquette, has evolved out of the cutlural influence of the world wide web. Wikipedia defines netiquette as "a set of social conventions that facilitate interaction over networks, ranging from Usenet and mailing lists to blogs and forums." In other words, it is a set of rules for behaving online. There are many books and resources online to learn and teach about netiquette. One resource I found is a book titled Netiquette by Virginia Shea. In her book she listed 10 rules to follow. Those rules are:
1) Remember we are human
2) Adhere to the same standards of behavior online that you follow in real life
3) Know where you are in cyberspace
4) Respect other people's time & bandwith
5) Make yourself look good online
6) Share expert knowledge
7) Help keep flame wars under control
8) Respect other people's privacy
9) Don't abuse your power
10) Be forgiving of other people's mistakes

You can read more details from her book by visiting: http://www.albion.com/netiquette/book/index.html

Some other good resources include:
Netiquette (Internet Etiquette) http://www.livinginternet.com/i/ia_nq.htm
Netiquette for Kids http://www.bpl.org/kids/netiquette.htm