Kdice.com

If you got extra time to kill and want to be more in touch with your fear and greed emotions I have recommendation for you. Kdice.com is online multiplayer strategy game based on simplified version of Risk. Each game last for 5-10 minutes and it's very intense. People get very angry sometimes, you can see bad decisions, risk management, waiting for good moment for attack. It's all very much like trading. I think that it's more useful to play Kdice than paper trade. Give it a shot.
You can practice first against computer at Dicewars, but against 6 other persons it's a real deal.