How Do You Start Learning How to Think?

When do you first start learning the process of how to think? And then apply that in real life to a real situation? Or in some sense different, although linked questions. One is Heat by Bill Buford and the other is Kitchen Confidential by Anthony Bourdain. I've often heard people make the, you know, draw the similarities between working in a busy restaurant or kitchen and working in an emergency department. There are certainly some similarities.