The following are links to websites you may find very helpful in your time playing World of Warcraft. These websites are ran by dedicated and hard working people whom supply reliable content.
http://www.thottbot.com/ - Thottbot is one of the leading site and my most preferred to use because of its ease and honesty.
http://www.wowhead.com/ - Wowhead is another great site I frequent, mainly because they have solid information and great talent calculators.
http://wow.allakhazam.com/ - Allakhazam is one of the leading groups of MMO websites out there and this is a great source if you need information.
http://www.wowwiki.com/Main_Page - Wowwiki is great for things like lore or class information.
http://wow-en.curse-gaming.com/ - Curse gaming is a great place to visit with constantly updated news and add-on submissions.
http://www.warcraftmovies.com/ - If you love the movies people make using World of Warcraft make sure to visit this site.
http://ui.worldofwar.net/ -A very good add-on and user interface site for World of Warcraft.
http://www.worldofraids.com/ - If you need information on raids or attunements check here.