Everyone should keep a commonplace book, a notebook of everyday wisdom to apply to your life. It might even be humor or sarcasm.
Believe or not, your teachers, friends, and even you may come up with something profound.
More often, some old man or woman will drop knowledge on you:
It is remarkable how much long-term advantage people like us have gotten by trying to be consistently not stupid, instead of trying to be very intelligent.
Charlie Munger
It could be anything. Lincoln said, "I learn from everybody, even if it's what not to do."
