A good list of rules to govern your Internet use, with explanations for each. It also includes an Internet Safety Agreement that covers the same rules and that teachers or parents can print out and ask students to sign.

This site from Wabash College gives rules not only for internet etiquette, but more specifically for etiquette concerning networks. This site is particularly relevant to college students.

[Free Registration/Login Required] In this lesson, 2nd graders learn when it's appropriate to use technology and when it's not, and practice making family rules for device-free time at home. Includes lesson plan, slideshow, student...

This thoughtful essay argues the dangers of miscommunication in e-mail and how to properly convey your message.