Ask any long term WoW player how to make gold and they will point you at many great grinding locations. They are expecting you to devote hours and hours murdering monsters in one spot that need you to be a minimum of level 60 to even get near these beasts.
This should tell you that most players have no idea a way to make fast gold in the WOW game.
Here is the best way to get all the gold you will ever need quickly even using a level one character.
No matter what level or what class your main character is, create a new personality that is really close to a major town Auction House. If you're playing Alliance, try creating a dwarf of gnome and run to Ironforge. You could try making a night-elf and running to Darnassus, but you could have more luck selling from the bigger Auction Homes . If you're playing Horde, create a troll or tauren and run to Orgrimmar.
Find the closest Auction House and figure out where the nearest mail box is in comparison. Park your low level personality close to the Auction House.
Download the free version of WoW Auctioneer and use it to your advantage. Each server has different prices for different items. Your target is to figure out using your Auctioneer add-on what's been severely underpriced.
Find as many under-priced items as you can. WoW players think they're being smart by undercutting other players making an attempt to sell items. In reality, all they're doing is reducing their own gold-earning capability and inflating yours.
Usually the higher priced items, like netherweave material or craggy leather are easiest to spot, but you'll also find particular cuts of gems and rare jewel-crafting stones are often under-priced as well.
Purchase any cheaply priced items on your server. Run to the closest mailbox and grab the items you've purchased. Then run back to the Auction House and put those items back on sale at their proper prices. You'll find that gems and potions sell very quickly, as do most materials, fabrics and leathers - even after you've listed them for sale at a moneymaking price.
Use your most important personality to level up, complete quests and explore the World of Warcraft world of Azeroth, but keep your low-level 'alt' personality close to the Auction House at every point. When your most important personality loots anything decent, mail it right away to your low-level personality to put up on sale on the sale House for you.
Once you've sold your profit items and your loot items, mail the gold back to your most important character.
Enjoy having more gold than any other personality around you!
If you do not forget to log into your arena of Warcraft account as your low-level personality first and spend a couple of minutes checking out items you could probably buy inexpensive and then re-sell at a profit, then you can switch over to your most important personality and continue to enjoy the game. You may always have masses of gold and takes minimal time out of your game play.