For certain help with raid builds, DPS builds, or Leveling Builds you can check out some links i have provided for classes from Wowikki!  Look at the "Links Window" that should be to the left of the page!.

 For a good Horde leveing guide i would recommend

http://joanaswowguide.com/   Joana's Horde Leveling guide 1-70 or 1-80 :D (not free :o)

For some really good profession guides i highly recommend

http://www.wow-professions.com/  (and its free!)

The World of Warcraft Guide Forum :)

http://forums.worldofwarcraft.com/board.html?forumId=69355&sid=1

This is a PvP guide to anyone who is EXTREMELY new at it!

http://www.gotwarcraft.com/pvp.php  (i read it when i first started playing)