This is a quick post on useful websites that do not easily fit into the “guides” pages.
http://www.wowhead.com/: Wowhead maintains news, guides, and a searchable database of every item in the game. If you have a question about something in wow, this is a great first place to look.
http://www.mmo-champion.com/: This site has periodic updates about wow, as well has having very well-trafficked forums.
http://www.reddit.com/r/wow/: This reddit subreddit is an official wow community site and has good, active discussion about wow.
http://www.reddit.com/r/CompetitiveWoW/: This reddit subreddit is narrowly focused on high-level wow raiding. There are detailed guides, log analysis posts, and more.
http://simplearmory.com/: This website allows an alternative view of the wow armory. The collectibles, mounts section links to a good guide for mount farming and tells what you missed at a glance.