Seated next to a CEO who had led a Fortune 100 company through a major, front-page disaster, I asked him how he had done it.
He said rebuilding the morale of the workforce was Job 1. Without its employees, the company would have collapsed.
To reinvigorate morale, he explained they had a song of the day - the CEO would hum a few bars to remind me of the song typically from the '60s or '70s. They had balloons. They had celebrations - cupcakes in the afternoon! That sort of thing.
It worked. The company survived and was eventually sold to another top company.