For any number of reasons, (not the least of which is liability), all posts must include the following information if available:
Active link to source
It should look something like this:
Here’s how to Create a Post Heading
May 18, 2012
Link to original
This information should be featured prominantly at the top of every post.
DO NOT VIOLATE SOURCE COPYRIGHT. If the source publication has a copyright policy that doesn’t permit posting the full article on AQ, then please post only an excerpt (perhaps a paragraph or two) and provide a link to read the rest of the article at the source.