Useful websites for wow

General useful sites:

http://thottbot.com/ - find any quest or item really helps.
http://www.wow-pro.com/leveling_guides/james_horde_leveling_guide - self explanatory.
http://www.wow-pro.com/leveling_guides/james_alliance_leveling_guide - self explanatory.
http://www.wowhead.com/?talent=c - build tester VERY useful for figuring out skills.
http://www.tentonhammer.com/wow/guides/ - guides for various things wow related.
http://www.maxdps.com - figure out what the best possible items are for your character at 70.

Mods: Extract all of these into your World of Warcraft\Interface\AddOns folder

Atlas Loot enhanced - allows you to lookup exactly which items drop where and link them through chat http://downloads.curse.com/details/2983/

Quest Helper - Helps with quests
http://downloads.curse.com/details/9924/

Titan Panel - very useful gui, tells you your current coords, bag space etc.
http://downloads.curse.com/details/618/

Cartographer - Reveals all the maps and tells you which instances are where etc very handy.
http://downloads.curse.com/details/9496/

Auctioneer - Tells you the general value of items on the auction house and let's you scan to find really cheap items.
http://downloads.curse.com/details/78/

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When you are not practicing, remember, someone somewhere is practicing, and when you meet him he will win.