The first thing you want to do is to take a look at the most successful music blogs online today. Even if they are not related to the genre of music you most enjoy, you want to see both what they have in common, and what makes them unique. The goal is not to copy a site, but to find inspiration—and gain a general frame of reference.
While researching the most successful music blogs of the moment, pay particular attention to whether they are global, and how long they have been around. Take detailed notes, covering what you do and do not like about the blogs you find—and utilize these notes for brainstorming.
Also, consider the avenues they utilize in conjunction with their blog. This includes interactive features, podcasts, apps, mixed tape streaming, and shared online playlists.