AP Stylebook Online is a searchable, customizable resource for writers and editors, by the Associated Press. It is updated throughout the year and includes Ask the Editor, Topical Guides and Pronunciation Guide.
This resource is designed for journalists but will assist anyone in becoming a well-informed consumer of news reporting. Have you ever seen a poll or survey in a news item and wondered about why it was reported like that? There are guidelines for that, to instruct journalists in what to report, and how!
For fun, be sure the check out the Specialty Chapters on Fashion Guidelines and Food Guidelines.