Once I hit Badlands, start farming earth elemental for Elemental Earth. Between vendor trash and full stacks of EE, I don't recall now how much Gold per Hour this yields but x2 full XP bars should get you well over the needed amount.
If you are on a PvP server, get ready to fight players for it -even level 60's farm here.
Luckily they have several spawn areas ranging in level.
How I level is: Get quests from HUB, kill everything between me and quest, kill everything on the way back .. If I find a nice spot to grind, stay until bags full. NEXT I always PvP the last full level no matter what until I cap at 8 or 9 -I forget.
First character is always Skinning/Mining ..