Marketing lessons are all around you.
Start paying attention to what you respond to.
What makes you laugh?
What makes you smile?
What makes you angry?
What makes you sad?
It could be anything from songs to movies to politicians to injustice in the world.
Your feelings were triggered. Ask yourself why? Ask yourself how did they trigger them so well.
A few moments of reflection will give you tremendous insight into people and in turn make you a better marketer.