Farming Motes/Primals

This method involves killing a type of enemy over and over again for motes, that can be changed into primals, these are: Mote of Water, Mote of Shadow, Mote of Life, Mote of Fire, Mote of Mana, Mote of Air and Mote of Earth.

Here are the locations:

Mote of Life
[Zangarmarsh][60-61][Withered Giants][Best]
[Zangarmarsh][62-64][Starving Fungal Giants]

Mote of Water
[Terokkar][62-64][Shimmering Eels][Best]
[Nagrand][64-66][Lake Spirit]
[Nagrang][65-67][Lake Surger]
[Shadowmoon][67-69][Enraged Water Spirit]

Mote of Fire
[Blade's Edge][66-68][Searing Elemental][Best]
[Shadowmoon][68-70][Enraged Fire Spirit]

Mote of Air
[Nagrand][65-66][Storm Ripper]
[Nagrand][66-67][Living Cyclones][Best]
[Netherstorm][68-70][Enraged Air Spirit]

Mote of Earth
[Nagrand][64-65][Tortued Earth Spirit]
[Nagrand][65-66][Enraged Crusher][Best]
[Shadowmoon][67-69][Enraged Earth Spirit]

Mote of Shadow
[Nagrand][65-66][Voidspawn] [Best]
[Netherstorm][68-69][Voidshrieker]
[Netherstorm][68-69][Unstable Voidwraith]

As you can see most of the best locations are in Nagrand, so if you have an epic flying mount it's a pretty good idea to fly about and get some of each. If you don't then the Motes of Fires are the best (however you aren't level 70 then go for the Mote of Water).

The prices at the Auction House vary depending on the Primal and then realm but most of the time Primal Fire is the most expensive and Primal Shadow the least.

Credit goes to WoW Tips for some of the locations.