One thing that really bothers me is when people talk about gold per hour. That is, the amount of gold you get in a given time frame doing a specific set of tasks. You can also relate this theory, and it is only just a theory, to the 80/20 rule where 80% of your gold must come from only 20% of your effort. Unfortunately both of these theories are almost impossible to quantify with any degree of accuracy.
Mind you I am not in any way saying that guessing your G/hour is pointless or always going to be wrong or a piece of information that has no meaning. No, I'm only going to try today to clear up an extremely popular misconception about the whole idea. One which just about everybody in the AH game likes to either ignore it or simply take g/hour as the word of god.
The only exception to g/h being immeasurable is farming a very specific group of mobs and skinning while alone or something along the lines of the shuffle when you vendor absolutely everything. You spend X time prospecting, Y time cutting gems, and Z time vendoring. Each one of those steps has an exact value attached to it which you can easily multiply and add accordingly. Hmmm, but what if you AH the rare gems? What if you like to DE carnelian spikes and turn them into scrolls to sell? Now it's suddenly impossible to calculate with any degree of certainty what so ever. This is where the problem comes in.
Let me give you the typical fallacy of the g/h myth. Actually it's more of a misuse of the theory than it is a misconception is certain cases. But that's just semantics, moving on. Here's the example: buy a widget from a vendor for 1g (copper rod, local cooking recipe, etc.) and place it on auction for 10g. That has taken you about 30 seconds to do so far. The items then sells for 11g, which gives you a 10g profit. What the typical person does here is instantly jumps forward in time to "omg I just made 10g in only 30 seconds! That means my gold per hours is 1200! Go me I'm gonna be rich tomorrow!"
Ok here's the first problem in why this is entirely wrong. You're completely skipping the 38 hours it took for that copper rod to sell. so rounding up here, that means that your g/hour from selling copper rods is somewhere in the range of... less that a friggin copper. Should you still sell copper rods? Of course. Is it great gold per hour? Obviously not.
The second problem here is another that is so staggeringly obvious that I'm shocked nobody has mentioned it before. These copper rods, these vendor recipes, these pets, you don't buy them from one vendor for 5g and sell them to another vendor for 20. You sell them to a person. A person who is either a moron, lazy, uninformed, or plain doesn't care what they spend on what. That person is not always there, the vendor that buys your common gems for 5g is always there.
So not only do these pro tips of slow selling items not make even a fraction of the gold per hour as they claim, they don't always have a person to sell to. Once you take these two things into account you'll have a much better chance of improving your actual gold per hours. Look a little bit deeper and you'll see that this whole time I've been repeating another one of my many AH motto's. Know your market. Know your customer.
To really make the g/hour theory applicable to anything is to add in one other part to the equation: repetition. If you get a world boe from an instance that you sell for 20k, your g/h is NOT 20k per dungeon run. So maybe make it like (gold / hour) / T where T is how much time you'd have to spend so that it can be repeated.
In the end, what you should be doing is what I keep telling you to do every Tuesday, look at the bottom lines first. Take the amount of time total that you spend working the AH, crafting, posting, collecting and everything else that goes into it. Tally that all up and then total up all of the gold you made for that day or week and put them together. That is what your real gold per hour is. Is that easy to do? No not really actually, I know because I've done it. But is it accurate? It is as honest about your g/h as you are. So when somebody claims an amazingly simple method of 600g/hour be wary as it is practically guaranteed that it isn't consistent.