acquired from Diablo 3 Dungeon | Farming Act 1 Inferno (With a Barbarian) / How I make 400k-800k gold per hour in Act 1 - Forums - Diablo III (not my guide)
Although this guide is for barbarians, other classes could do the same run (probably even faster).
Many barbs get stuck on Act 1 until they can get more gear, even if you aren't stuck farming in Act 1 can be more effecient than doing the same in Act 2 because of the difficulty increase. You can actually make quite a bit of gold in A1. With my technique I make 150-200k gold and 20-30 rares per hour. That can easily add up to more than 700k gold per hour depending on your auction house skills, gold/magic find (i have less than 10 of each) and luck with what rares you get. You can push this even furth with good gold and magic find. Even with crappy rares you are making at LEAST 400k an hour, but I always make more than that after the AH sales roll in.
Here is a video of me doing one run. You can find a guide for the build here. Diablo 3 Dungeon | Guide > Barbarian Kiting With a Barbarian in Inferno
Each run takes less than 20 minutes, and you will find 5-8 rare mob spawns per run. You don't need perfect gear at all to do this, in fact any half geared barb could do this run without breaking too much of a sweat.
Farming Act 1 Inferno for More Than 700kg/hour - Barbarian [1080p] - YouTube
Start at the Khazra Den quest, unless you can also do The Butcher with the same build, then start on quest 9: Cursed Hold witch also lets you do the warden, more on that later) and clear all of the Fields of Misery starting at the graveyard waypoint. There is almost always an elite skeleton near that waypoint, so make sure you look for him to get that first easy stack.
Go into the den whenever you find it and clear that as well. Go into all of the caves and special dungeons you find, they are always worth it. Open all of the chests, rock piles, tree stumps, etc that you see, and pick up every blue, gem, and rare. You will quickly get 5 stacks, so as you continue you will get increasingly good drops.
Once the whole field is cleared go to town, sell all blues, inventory your rares, finish the quest, and start over. Alternatively, since you now have stacks (and you'd lose them restarting the game) you could go to the graveyard and run all of the crypts. There are a decent number of elite mobs there as well, so it might be worth it. I tend to just restart though because it is faster and easier.
If you can easily do the run without having to worry about dying I'd replace ignore pain with threatening shout and the rune that increases treasure drops. 15% more loot could mean more than 50k gold per hour more.
I cleared it, now what?
So you cleared the Fields of Misery, and have five stacks. Now if you aren't decently geared, I'd recomend restarting and doing the same run over again (after finishing the khazra quest for extra gold). If you can use the exact same build to solo The Butcher without dying at all, then you can go to the last waypoint of the act and search the dungeons for the Chamber of Suffering, and make your way to him killing all of the elites on the way. Make sure you start on the quest for the Warden (the second to last one of quest 9) and kill him first. He drops quite well. It takes me about 15 minutes with the build I posted above, which is hardly a great build for killing the butcher.
If you are planning on doing The Butcher with the kiting AOE build, then make sure you bind a key to auto attack, since the auto does more to a single target than the Seismic Slam. You still use the slam to hit him while he is on the fire. If you are geared enough it shouldn't be a problem to beat him with that build, and if you aren't then keep farming the Fields until you can.
If you die even once or twice you won't get enough gold and items to make it worth doing. If you have to switch builds and lose stacks it isn't worth doing. But if you can get to him killing the elites on the way then kill him while keeping your stacks then it is a good idea to finish here, as you make about the same per hour doing that (but it is harder).