At the end of the day you’re a musician first and a marketer second. It’s always okay to bring in some outside help, but knowing the most common marketing mistakes musicians make will help you set yourself above the crowd by embracing the new opportunities available to you for promoting your music.
Music first and foremost is something you feel, something you hear, and something you express. Make it mean something to YOU first. Honesty and truth when done well always gets through to the listener.