Self sabotage

QUESTION: If you were to write a book, What would you choose as the topic?

I would like to write a book on the ways that we, as women, and as humans, self sabotage ourselves.It happens SOOO often with relationships, school, work, sports. Every time we turn a corner there is a chance to sabotage something because of self doubt. I would like to MASTER this subject and write a book about it.