Not to be too self-promotional, but I actually discussing customer identification strategies in one of the free classes I've posted online. You can find it here:

https://aarondinin.com/free-course

(It's the one about validating startup ideas.)

Aaron Dinin, PhD

I teach entrepreneurship at Duke. Software Engineer. PhD in English. I write about the mistakes entrepreneurs make since I’ve made plenty. More @ aarondinin.com