How should people invest if the U.S. credit rating is downgraded?

This is a great question, and one which is most likely on everyone's mind at this point in time; especially because I think a majority of Americans did not think the debt ceiling negotiations would be drawn out for this long.  I think the most important aspect of investing in times of uncertainty like this is to remain as diversified as possible.  Don't completely give up on the US equity market, but make sure you are exposed to a number of different asset classes.  Keep some of your money in large cap blue chip US stocks, then spread the rest of your money across domestic commodities, emerging markets, and products with a history of uncorrelated returns vs other assets classes, like managed futures.