Google executive Ruth Porat, who worked at Morgan Stanley during the 2008 financial crisis, shares important lessons she learned from the experience.Her biggest advice is to identify vulnerabilities and fortify against them before a crisis hits.Porat emphasizes the need for businesses to have a team with horizontal vision to connect the dots across different issues.She also highlights that in a crisis, there are no good choices, so it's best to make the least worst decision and keep moving.