Joys of Punctuation  
   Explains when to use commas, semicolons, dashes and hyphens, with light-hearted examples of correct and incorrect usage.
   http://www.engl.niu.edu/comskills/students/editing/Joy.html

Punctuation Tips  
   Features a list of commonly used and misused punctuation marks, with examples.
   http://www.lrcom.com/tips/punctuation.htm

Punctuation Chart  
   A simple table shows the names and symbols, what they do and when to use them. Includes a famous example of the humorous effect of poor punctuation.
   http://www.geocities.com/SoHo/Square/1521/6punctuate.html

Punctuation Reminders  
   A list of the most common errors, with sentences indicating correct usage.
   http://www.virtualsalt.com/punctu8.htm

Quotations and Correct Punctuation  
   Explains and illustrates the rules which apply to quoted material, including where to place colons and commas.
   http://ace.acadiau.ca/polisci/aa/digagora/tutorial/qpunct.html

Punctuation  
   Describes common difficulties and how to work out the correct usage, as well as taking account of international differences.
   http://www.stage-door.org/stampact/punc.html