From The Pragmatic Capitalist:

With uncertainty returning to markets and the problems of debt continuing to trouble investors, the dollar remains the primary beneficiary. Of course, a strong dollar creates numerous problems for various asset classes.

In a recent strategy note, David Rosenberg of Gluskin Sheff notes the various ways to position yourself for a dollar rally:

Since the onset of the credit crisis in 2007, there have seen three occasions when a surge in risk aversion caused a period of U.S. dollar strength on flight-to-safety trades...

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More on the U.S. dollar:

A BIG trend to keep your eye on

Morgan Stanley: This trade could be hugely profitable this year

The Fed's greatest nightmare: France calls for new reserve currency