I shearched for a mining guide but did'nt find anything, that's why I'm gonna make my own. It's quite common sense, but people may don't know about everything that i'm gonna tell you.
First, the route : http://s2.noelshack.com/old/up/sansq...54447e6470.jpg
You should start at the green arrow because all the players that are farming here are going on the other way because it's clother of the Ally and Horde's city.
I suggest you to not go in the cave (yellow cercle) because there is a lot of people and a lot of 85 mobs.
Some common tips : Get a 280% mount and gatherer if you don't have them
DON'T make Hardened Elementium bar if you want to mine for gold. Because Hardened Elementium bar sell for worth than 10 Elementium bars and 4 volatil earth in most of servers.
Try to farm when people are not playing : Early in the morning, very late at night, or when people are working.
Mining is actually on of the best way to make gold. And it's easier and faster than farming gold. Think about it.
For people that want to up ming from 0 to 525 check this guide that i did'nt do : WoW Mining Guide 1-525 | Mining Leveling Guide
Mining is very fast to up if you follow this guide, i did 0-525 in like 2 days and now i make a LOT of gold.