Canceling a credit card at the wrong time can really ding your credit score. On the other hand keeping it around can equal more debt, more hassle, and a less secure identity. Aware of all the gotchas, personal finance weblog Get Rich Slowly examines when and how you should go about canceling a credit card. The short version:
If your credit card balance is zero, go ahead and close as many unused accounts as you want. As long as your credit cards are balance-free, it won’t hurt your credit score a bit. So call those card issuers and cut away.

In 1999, the price of oil hovered around $16 a barrel. By 2008, it had crossed the $100 a barrel mark. The reasons for the surge ranged from the relentless growth of the economies of China and India to widespread instability in oil-producing regions, including Iraq and Nigeria’s delta region. Triple-digit oil prices have redrawn the economic and political map of the world, challenging some old notions of power. Oil-rich nations are enjoying historic gains and opportunities, while major importers — including China and India, home to a third of the world’s population — confront rising economic and social costs.

Managing this new order is fast becoming a central problem of global politics. Countries that need oil are clawing at each other to lock up scarce supplies, and are willing to deal with any government, no matter how unsavory, to do it.

In many poor nations with oil, the proceeds are being lost to corruption, depriving these countries of their best hope for development. And oil is fueling gargantuan investment funds run by foreign governments, which some in the West see as a new threat.