Leveling mining and herbalism are the two easiest ways of earning gold at low levels. Selling ore and herbs on the Auction House is a good way to get a nice amount of gold as you are leveling up. It is even quite useful to farm gold like this on higher levels. It is an advice that you download the Gatherer addon which will track all of your discovered ores and herbs so you don’t have to roam around trying to remember where a vein or a herb was on the map.

Mining

Where to find the trainers?
Mining trainers can be located:
* Brock Stoneseeker (Loch Modan)
* Dank Dizzlecut (Dun Morogh)
* Dulvi (Azuremyst Isle)
* Gelman Stonehand (Stormwind City)
* Geofram Bouldertoe (City of Ironforge)
* Hurnak Grimmord (Hellfire Peninsula)
* Kurdram Stonehammer (Darkshore)
* Matt Johnson (Duskwood)
* Muaat (The Exodar)
* Yarr Hammerstone (Dun Morogh)

Best areas to mine:

Best areas where you can mine Copper ore are Dun Morogh and Elwynn Forest.
For Tin ore you should scour the eastern parts of the Redridge Mountains and Loch Modan.
For Iron ore and Gold ore it is recommend to go to Alterac Mountains. Other places like Ashenvale, Desolace, Stranglethorn Vale, Arathi Highliands and Badlands are also nice.
For Mithril ore and Truesilver ore you should go to Highperch located in the Thousand Needles. Badlands is also a good location for Mithril ores. The best area there is Lethlor Ravine.
Best places for Thorium ore and Dark Iron ore are Searing Gorge and the Burning Steppes.

Herbalism

Where to find the trainers?
Herbalism trainers can be located:
* Alma Jainrose (Redridge Mountains)
* Brant Jasperbloom (Dustwallow Marsh)
* Cemorrhan (The Exodar)
* Cylania Rootstalker (Ashenvale)
* Firodren Mooncaller (Darnassus)
* Flora Silverwind (Stranglethorn Vale)
* Herbalist Pomeroy (Elwynn Forest)
* Heur (Azuremyst Isle)
* Kali Healtouch (Loch Modan)
* Malorne Bladeleaf (Teldrassil)
* Malvor (Moonglade)
* Morae (Bloodmyst Isle)
* Reyna Stonebranch (Ironforge)
* Shylamir (Stormwind)
* Tannysa (Stormwind City)
* Telurinon Moonshadow (Wetlands)
* Uma Bartulm (Dustwallow Marsh)
Best areas to find herbs:
Best areas to find Peacebloom, Silverleaf and Earthroot erbalism are Elwynn Forest and Teldrassil.
Continue to Westfall for more of the Peacebloom, Silverleaf and Earthroot and you will also find Mageroyal.
Redridge Mountains and Stonetalon Mountains are the best areas for Bruiseweed and also in the North part of Stonetalon you will be able to find Kingsblood and Wild Steelbloom.
Duskwood is also rich in these two.
Fadeleaf can be found in Arathi Highlands, Alterac Mountains and the Hinterlands.
The herb heaven, aka the Swamp of Sorrows, is home to Khadgar’s Whiskers in example and a lot more different herbs.
Feralas is a nice area for Sungrass.