http://www.almostgaming.com/wowguides/world-of-warcraft-mining-guide-1-300-with-maps
I used above guide. I liked it because it had maps that showed what route to take in each area.
Also, despite all the usual garbage there, the official WoW forums actually have good info on powerlevelling all professions; including mining.
http://forums.worldofwarcraft.com/thread.html?topicId=102789457&sid=1