A lot of musicians don't learn the business. You just have to be well-rounded in both areas. You have to understand publishing. You have to understand how you make money, what's in demand, what helps you make the most out of your talent.
Showcase article: Polta, Anne (2007-02-08). "Continuing Journey: Bradley Joseph sustains music career with songwriting, recording". West Central Tribune. Retrieved on 2007-02-18.