I've searched through the forums but haven't seen any information on how to earn currants. What actions can I do to earn currants? (other than completing certain quests which have them as a reward)
I forgot about quoins. There are a few really high value quoins out there, so if you come across one, remember where it is and check back every so often.
One other way to earn currants would be to beg. There are a lot of players with more money than they need who would be happy to help you out.
Sell things - either in auction or to the vendors.
gems and ores are good if you have mining skills. meat, butterfly milk, grain and veg if you have a garden can be good to sell in lots of 50 or more on the auction. Look to see what other players are selling and what is getting most currants. Personally i used mining to get gems and ores to sell / and for favour, but there's more than one way to earn currants. The more 'processed' an item is the more it will bring, but that depends on learning higher level skills.