The lesson is that the basic principles of conventional macro management have been proven to be relevant in conditioning an economy against turbulence.
Countries that observe and protect their basic indicators, such as the national budget deficit, current account deficit, ratio of debt to repayment capacity, foreign reserves, inflation rate, liquidity growth and exchange rate under a framework of sustainable economic growth, in general, are in a better position to confront a crisis. Conventional wisdom prevails even (or especially) during a storm.