At the risk of being seen as alarmist and anti-American*, I suggest if you have any investments denominated in US$, that you get out ASAP. With the humungous government and national debt you folks are running, inflation and consequent devaluation of the US$ is very likely. This is why gold is at an all time high (appx $1,100 - 1,200 per ounce) and still trending upwards. People are trying to get out of the greenback.
I don't have any suggestions as to what you should invest in, though, except maybe ammo and canned food.
* I think of myself as un-Australian first, and anti-American second.