I'm studying the Law of Attraction and positive thinking and Acoustic Guitar. Still working on my 2nd week.  I'm considering self-improvement as I believe this is the key to all success. I also like some of the products on ClickBank that focus on the Law of Attraction. But I also like dogs and concerns with their health. It's a lucrative niche(pet industry) and music has always had a magical effect on me.  How does one narrow down a niche and decide once and for all for a first niche?