How to make gold at low levels with Mining & Herbalism

The easiest way to earn gold at low levels, and even at higher levels is by using Mining and Herbalism. By selling orbs and herbs on the auction house you will get a nice amount of gold as you level up. To make things easier you can download the Gatherer addon which will track all of the herbs and orbs that you discovered so you won't have to run all over the place and have a hard time finding them.

Alliance: (scroll down for horde)

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.

Horde:

Mining

Where to find the trainers?

Mining trainers can be located:
* Belil (Silvermoon City)
* Brek Stonehoof (Thunder Bluff)
* Brom Killian (The Undercity)
* Johan Facht (Silverpine Forest)
* Krugosh (Hellfire Peninsula)
* Krunn (Durotar)
* Makaru (Orgrimmar)
* Pikkle (Tanaris)

Best areas to find ores:

The best area for mining Copper ore is The Barrens.
Tin Ore can also be found in The Barrens, usually in the southern parts. The Stonetalon Mountains and Thousand Needles are also home to a lot of Tin veins.
Iron ore and Gold ore could be found in the Alterac Mountains. Ashenvale, Desolace, Stranglethorn Vale, Arathi Highliands and Badlands are also goof areas to mine Iron and Gold.
Mithril ore and Truesilver ore can be found in the Thousand Needles - Highperch. For Mithril ore another good place could be Badlands. The best location there is the Lethlor Ravine.
Best spots for Thorium ore and Dark Iron ore are the Burning Steppes and Searing Gorge.

Herbalism

Where to find the trainers?

Herbalism trainers can be located:
* Angrun (Stranglethorn Vale)
* Aranae Venomblood (Hillsbrad Foothills)
* Botanist Nathera (Silvermoon City)
* Botanist Tynarriel (Eversong Woods)
* Faruza (Tirisfal Glades)
* Flora Silverwind (Stranglethorn Vale)
* Jandi (Orgrimmar)
* Komin Winterhoof (Thunder Bluff)
* Malvor (Moonglade)
* Martha Alliestar (Undercity)
* Mishiki (Durotar)
* Ruw (Feralas)

Best areas to find herbs:

Peacebloom, Silverleaf and Earthroot could be found in Durotar, Mulgore and Tirisfall Glades.
Westfall and the Barrens have plenty of those herbs as well as the Mageroyal. 
To collect Bruiseweed go to Stonetalon or Redridge Mountains.
Wild Steelbloom and Kingsblood could be found in the North part of Stonetalon.
To collect Fadeleaf go to the Badlands, Hinterlands, Alterac Mountains or Arathi Highlands.
One of the best places to farm various herbs including the Khadgar's Whiskers is the Swamp of Sorrows and to find more Sungrass visit Feralas.