First of all to start off I play a Hunter and I do skinning. I am also an engineer with a mote extractor.
Now one of the ways I make money is by skinning Clefthoof's and snakes.
Now one my server (Skullcrusher us) you can sell a stack of clefhoof leather from 40-50g. For 1 Cobra scale you can get 10g. When one of my spots is taken I go check the other and if filled I proceed to check motes or go to Halaa. Every 30 minutes or so I get on my mount and check the motes of air spawns.
Another good spot if not overly farmed on your server would be the throne of elements. This provides a great source of motes.
If anyone has anything else they would like to add feel free to go ahead.
Skinning: Red: Clefthoof Yellow: Snakes Green: Throne of Elements
Mote spawns:
I also play a priest which is a Jewel crafter another great way to make cash. I farm Nagrand and prospect all the adamantite ore I can get.
Mining:
This is the path I follow to get my adamantite.