Tourneys and artwork/texture making are prolly the 2 greatest sources of TC in the community. You can also broker items like stock, shuffling between the market threads and the Toriexchange, but to make decent TC at that, you have to troll waiting for good deals, and then have a good understanding of basic toribash economics to know when to buy and sell.
The next step up in expense would be to buy a booster. They're decently priced if you're an active player.
Also, with some of the promo's lately, it'd be worth your time to buy TC, sell all of your promo items, and then sell all of those for TC too... you might be able to double your TC just from that.
Last edited by Brainstorm; Nov 27, 2008 at 07:56 AM.