Lousy advice in that article! OK, selling your real-estate would have been good advice in 2005, but today it's already too late.
We've still got time to sell some stocks, though. Get liquid!
This is a liquidity crisis, inasmuchas having global over-production means a reduced ability+desire to lend and a heightened awareness of the value of having cash-on-hand instead of wealth tied up in physical assets.