Thinking of writing a book

Lately I've been thinking of writing a book. I know there is a least one book in me to write. It seems like every Tom, Dick and Harry wants to write a book. Some people start but never finish and others talk about writing a book but never actually do. A smaller number of people finish writing a book but it is a piece of crap that nobody would publish never mind buy. I don't want to be one of those people that never finishes. It could be a piece of crap for all I care as long as I finish writing it. It would be a way of getting this book bug out my system. I think everyone that is plagued with this bug should finish writing a book no matter how crappy it is because it would be like a purging. They would finally get a feeling of completion and closure. You would finally know for certain whether you have what it takes to write a good book.