Play the Auction House buying low and selling high. An advanced tactic is to control an entire item. For example, buyout all light leather on the auction house and then sell it at double the price, buying out anyone who undercuts you. This forces people to pay your prices and so you can potentially double your gold. However, this is a risky strategy if you are competing against too many players. You will also need a large supply of gold to start it.

Empty your bank and bags! This is another thing to do to make room for all those tasty drops in WOTLK. Another bonus is that you can sell everything that you will not need. Vendor or auction house everything that you will not need and then delete any old pvp gear you have. Make sure to sell all your mats in your banks as the prices of these will plummet on WOTLK release. This is of course only if you know you will not need them to level a profession in the expansion.

Grind! I know it is a bit boring but it is still a good way to make some gold. Elemental plateau in Nagrand was always my choice of venue but there are hundreds to choose from. Just search the official wow forums or google it.

I think a safe amount is 1k gold per character. This should mean that you can afford the necessary upgrades as you level and could cover a lot of the profession levelling. Obviously if you have something like 5k gold then you will able to level faster as you can buy enchants and good gems for your gear.

 

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