Easy gold in Runes of Magic

The easiest way, in terms of effort, to get gold in Runes of Magic is to sell and buy gold and diamonds in the Action House. The trick is to never buy someone else's gold or diamonds, always post your own offers in AH. An easy rule is to buy diamonds for less than 40k each, and sell for more than 40k each. As long as you stick to that you're always safe.
On my server I can buy for 37k and sell 43k in a short time which means 600k profit with a 100 diamonds. I went from 150 diamonds to 700 diamonds in less than a week, with no real work. I could do quests or minis and just check my mailbox once in a while. The more gold/diamonds you got, the faster you will make money.

I've been getting more and more readers so please post a comment, in any thread.

Score for More Diamonds - Redeem voucher

When you get a Score for More Voucher, you shouldn't use the redeem page at runesofmagic.com, you should click the recharge diamonds link, just like when you buy diamonds.

If you haven't done it before, login using your first password and select the correct server.
Click on Redeem coupon, if the text isn't in your language, then click the top one of the 2 bottom buttons.
Paste in the code in the field, and you should have your diamonds when you login.