I am aware of that some of my tips allready is on the forums! I have added some of my own tips and everything in one big collection!
I'm making this guide to get rid of my leecher status, some things are taken from other people, some things are made by me.
Trick #1: The auction house!
This tip is probably the same age as WoW is. The point is to manipulate the AH prices for your profit. To do this you need a starting amount of 1-2k gold.
Example: There is 20 Frozen orbs at AH for 20-28g each, you buy em all and resell them for 35gold each. Belive it or not but people will acctually buy the Frozen Orbs because they are used in so many things. Profit: 200g+-. If you dont manage to sell them before new 20g orbs comes out at the AH you should put bid on your Frozen orb at 15g and buyout 35g. Some people will acctually buy those orbs since they have the Lowest Bid on.
This WONT work with armour or something smilar, it works best with something that many people uses, mats such as Abyss Crystals, Frozen Orbs and Greate Cosmic Essence is easiest to sell and makes a good profit.
Trick #2: Horde and Alliance Auction House
For this you will need 2 available accounts to play on with one horde character and one ally. I use a friends acc. The economy between the factions has to be quite different to make this work. I use my 80 hunter and a friends acc, lvl 1 warrior. To transfer gold to the lvl 1, you need to use the neutral AH in Bootybay or Gadgetzan. Before you run to a neutal AH on your lvl 1, check the AH and look up the differences.
Examples from my server;
Sirens Tear, Ally: 50G, Horde 300G.
Abyss Crystal: Horde 85G, Ally 200G
You need profits like that, else its just a waste of time because the Neutral AH cut off, (15 or 20%) is just to much if you dont make enough with cash.
If you found something that might be worth buying and selling do this: Run with the lvl 1 char to either Booty Bay or Gadgetzan (this is a pain because you will die every 5 yards..) When you reach the Neutral AH with both characters, tansfer the gold or items hat you want to make money like this: If you want gold, put up a grey item for the amount of gold that yuou want and buy it from ur main.
DONT FORGET TO PICKUP THE FLIGHT PORT IN EITHER BOOTY BAY OR GADGETZAN! You don't want to run again.
Stuff you might want to look for:
Abyss Crystals, Frozen Orbs, Epic gear, Twink gear and enchanting mats.
Trick #3: Siren's Tears
I dont know if this is posted here before. You dont need any starting amount of gold. Siren's Tears sells quite good (200-350G) depends on what server that you are on, and are used for mats to some cloaks.
How to Accuire Siren's Tears:
They have a rarespawntimer on 2-3hrs at a store in Borean Tundra, (cords: 43 1. The reagents to buy this tear is 100 Winterfin Clam wich you need to collect at the murloc place to the west of the shop. They are lying on the ground all over the place, just find a good route and collect em.
You will probbly not be the only one who will be camping the store, but once ou get a tear, try to come back every 2-3hrs to check again.
(Clams are not hard to accure, takes around 15minutes to get 100)
Trick #4: Level your alt!
I know, I know, this is pretty much common sense, but I just want to remind you that its a good choice to level up your alt. I belive that quite many people have lvl 70 alts lying around since tBC time.
If you have that kind of alt and if you need some gold then its totally worth it. You will gain another lvl 80 and gold. Now, if you have enchanting on the targeted alt then you will increase the gold making. If you have enchanting on another character, send all BoE greens that you dont need to him. The enchanting part is acctually a pretty big amount of gold.
Don't flame this one, I know that this is common sense but it is a good alternative to get another 80 and some gold!
This is all that I have time with atm, more will come! Once again, I know that I came up with all of these methods.
Yes, I know that my English isn't very good.
Feel free to ask anything!
More will come very soon!