-People who sell their items through chat. This is usually not a great option. Trade chat in West Archo can get you a buyer sometimes, but it's usually not very effective.
-People who sell their items through a 'cat shop'. This is a goodPerfect World gold option for the medium-priced items.
-People who sell their items through the auction. This is a great option for the medium to high-priced items. You can set a minimum bid (and a buyout price), then just go grind. After 24 hours, the item will get sold to the highest bidder (earlier if someone payed the buyout price). Downside is that you have to pay to use the auction. Costs are negligible though, just make sure you'll get more money out of it than you put in.

D) Farm
"What, I'm not a farmer!" No, but you should farm materials. Anytime you see a material, grab it. They sell high and they're quite common, especially at the higher lvls, when you're the only one around to grab it. It's usually best to decide what materials you'll grab though, as bank space is limited. If you have to decide, pick either herbs or the rest.

E) FB's are great exp

But they're horrible for money. Do NOT, I repeat, do NOT lvl doing just call to duties for the reward. There is NO Perfect World gold reward, and you won't get a lot of drops in dungeons. You may get lucky and get a mold, but don't count on it. Do an fb every once in a while, don't constantly stand in towns asking for call to duties.
How does this make money? Because it relates to grinding. No fb's = more grinding = more Perfect World gold .

There, that's basic money making. Now, how to save the money you've made.

A) Walk, fly, run, swim

"Uhh, I do that already." Yes, but not enough. Way too many people teleport around places. Put it this way : If you're paying to teleport around Archosaur, or paying the -I think- 5K to go from Sumor Camp to Swiftwind Tribe, you're wasting your money. You may think it's not a lot, but it really builds up. Teleporting is the number 1 mistake people make regarding their Perfect World gold.