This wiki can be a home for how to articles, tips & tricks, and other features not on http://ansible.cc/docs/.
In general, information that is relevant to 80% of users should strive to make it into the core curated docs (send a pull request to docsite/rst/*.rst in the main project), so the Wiki will not duplicate things that are part of the docs project.
This is also not a forum for bug reports or questions -- please use the issue tracker for bugs and the mailing list or IRC for questions (however please fill answers into here). Thanks and have fun!
Tip: Use double left and double right square brackets (MediaWiki style) to make links to articles.