What's the best marketing strategy ever?

Business Growth

Whats is the best marketing strategy? In reading the book Crush It by Gary Vaynerchuk....simple....care.....yes....CARE.... What would be interesting would be to look into what the best marketing plan ever is, and what the best marketing plan ever written down was. With all the amazing stuff going on in the world, I would not be surprised if they are written and created daily.