First of all tune your hearth stone into an area that has a horde/alliance auction house. Then fly to Gadgetzan, Tanaris then fly to Cenarion Hold. Then walk to the back of Un'Goro Crater.
There you can do two things, either farm for Rugged Leather off all the beasts there.
Or my favorite the Devilsaur-with the Devilsaur you can sell here skin in stacks of 10 and make a large sum of money.
Usually I can sell a stack of 10 for about 30-40g and it takes me an hour to an hour and a half.

I know this place has been mentioned before, but I thought I would go into it with a bit more detail.

The place I’ am talking about is Fungal Rock in Un'Goro Crater, the Gorilla cave. The Mob's here are level 51 – 53. I think with the exception of the boss who is 55.
I ground here yesterday for exactly an hour to see how much I could make, with a 60 warrior. The loot here is pretty good, the mobs drop hair, whiskers