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.
Recently I made a record entirely on my laptop, and called the “band” Hurricane Bells. One of those songs just got put into the new “Twilight” movie, and soundtrack.