8. Restoration/Diadem. These items sell SOOOO fast....but. I loathe diadem with a passion as I spent days in there. I suppose the one great thing about this that you are providing a community driven experience for near instant sales of the certified mats.

9. Crafting material ratios! As an Omni crafter...I personally HATE making mid mats for higher recipes. I find them a speed bump that must be hit to get to the real recipe.
Example: Dwarven Mythril Nuggets. dimythrite sand and mythrite sand. (names could be wrong...it's been a while), but it's a 4:1 ratio. I need 4 ore to 1 sand. Now any market analyst would ask you...which would you sell more of? The 4 is going to out pace the 1, always. So when you farm items that need 4,5,6 items in a recipe over the ones that need 1,2. Your going to most assuredly going to make the sale. Focus on these and your going to see my next point....

10. Time on Lot. Check the sales history....always. Just put yourself in a habit of doing it. I can save you a massive amount of time wasted.
Example: Make a ilevel 510 Exarch ring of fending. Let's say the item sells once per day. There are 25 hits of that item. How long do you think it will take to sell that item? 1 day...1 week?...maybe a month?

For time on lot you have to ask yourself how fast you want your RoI (return on investment) If spend 3 hours farming I want my return to be within a 24hrs. Ok, let's look at the sales history again.

Example: Dymthrite sand has made 65 sales per day. vs. tin ore of 3 sales per day. Which do you think is going to sell faster?

Pro tip: Sell what is needed....and vendor what is basically trash. Tin is like 4g per unit on MB, don't waste time posting it....it will sell in like 4 days. If you can't turn around your sales in 24hrs, your selling the wrong mats.