Jeff Bezos built a company around the idea that it is always day one, and day two in his telling is decline. On a first day every idea seems possible and nobody is defending how things have always been done. About three quarters of the way through a summer the energy dips, everyone settles into routine, and starting anything new feels too late. That is precisely when the idea earns its keep.
This is the short version. The full lesson, with the story behind it, is in the book.
Take The Summer Camp MBA with you, or get the field notes by email while you work through the lessons here.