Basic idea is like the whole "rate the person above" thread, but rather than gear its gold making strategies.
The rules are simple, your post should be set out like this:
1) mark out of 10 for the above idea.
2) How you suggest improving the above idea
3) Details of your idea (how much it tends to make you and how much time you put into it)
Simple I hope
Right, time to kick things off.
Saronite ore -> titanium/titansteel.
Basically, I buy saronite ore for <13g a stack then smelt it. The bars are then sent to my alchemist where they are turned into titanium. I then load up a simple spreadsheet I made and put in the cost of the eternals needed to make them into titansteel and the current AH price and it tells me if it is more profitable to make it.
The average amount of gold I make from it is around 500g+ a day (limited by the amount of saronite ore, tend to buy around 800+ a day).