In the latest patches after 2.4 daily quests have really been the best source to make fast gold in wow.
The entire shattered sun offensive is just 1 big money making pit. By running a circuit and grouping all the quests into areas you can maximize your gold per hour rate. Not only do you get good money but some of the quests even reward shattered sun supplies which have a chance to contain heroic badges which you can trade in for some of the best gear the game has to offer. The current limit is 25 daily quests per day. The average daily quest pays about 10g. So that's 250g per day. And that's without all the drops and gold from the mobs that you have to kill in order to complete them. Everything added up can make you up to 300 gold per day.
Now that epic flying mount that seemed impossible to get is only 2 weeks away. And with a bit of farming or smart reselling you can get it even sooner.
A few best practices for dailies: go to my website (link at the bottom) to find the fastest routes and best ways to combine the daily quests.
Using the maps and quick guides to plan out routes speeds things up a great deal. You can also use some of the other tricks mentioned there for additional income.
Now there is nothing in your way to make lots of gold and enjoy the luxuries of a epic flying mount or being able to buy epic gear from the auction house.