By now, most investors know that the U.S. Federal Reserve and other global central banks continue to engage in dangerous, currency-debasing forms of monetary stimulus - meaning it's time to stock your portfolio with inflation-proof investments. Known as quantitative easing on this side of the pond, there are dire consequences to just one tryst with QE. But here in the U.S., we're on our third go-round with the QE addiction. This means we're headed down a dangerous path. That's because too much money supply triggers inflation. While it's not definite that QE3 will bring about a return to the old Weimar Republic or the problems Zimbabwe has had to deal with recently, there is almost no getting around the fact that a financial system awash in liquidity is a financial system vulnerable to inflation. Over the course of history, gold has been the favored destination for investors looking to combat inflation, but there is more to the story these days. The good news is inflation can be fought myriad ways and that includes going beyond the usual suspects. Here are a few other overlooked inflation-proof investments that'll let you profit while prices soar.