There are plenty of daily quests available that you can make money in World of Warcraft. You can perform up to 25 quests every day and you can make possibly as much as 300 gold a day just doing quests. However if you find the right quests, you can make even more gold.
Banish More Demons Daily Quest
This particular daily quest found in Blade's Edge Mountains has a great potential in making gold. This is quite a simple quest, requiring you to banish 15 demons for 12 gold reward. Besides that you may also get a nice item reward in Kronk's Grab Bag. This Bag randomly drops either a Darkrune or a fragment of a Darkrune (5 fragments will make a whole Rune). Darkrune is the key to making gold.
This is what you have to do:
Take the Darkrune to Ghak who will give you a Crystalforged Rune.
Take the Rune and use it at the teleporter south of Forge Camp Wrath.
You will find multiple boss mobs appearing from the transporter, whom you have to fight with. The fight can get a bit hard, though.
The final boss, Shartuul will drop a rare or epic quality item, with value ranging between 50 and 1200 gold.
It is true that you will take a while to master the quest itself or to be able to kill the mobs that appear in the transporter event, but the reward is well worthwhile. If you master the quest, you will get anywhere up to 1200 gold in about 45 minutes of gameplay. If you are not so good yet, the worst scenario is that it will take you five days.
Daily Quests for Gold
Throughout Outland there are daily quests available to you when you acquired your flying mount. In addition to the gold rewards you can also make solid profits with the rewards and quests lines. Learn which daily quests are worth you while and which are the top gold mines. This is the way to make money playing World of Warcraft.