While I listed some of the songs on the playlist, I didn't describe how I use this list in my writing/editing and how I build the playlists I use.
After the first draft is completed, I read the entire manuscript several times, jotting down songs that might work for each scene. I start building a playlist on iTunes and play the list while I read a scene, adding and subtracting songs that seem to 'fit' with the tone and circumstances.
Following the second draft, I have a good idea of the playlist for each chapter. I read over each section again before setting aside the computer. Then, I put on the playlist, close my eyes and allow my mind to 'live' in the chapter through the music. I know the playlist is 'true' when I can see the scene in my mind without forcing or trying or exerting my brain.
Once I'm able to visualize the scene in my mind, I can move on to the next stage of editing, removing any needless elements and boiling the chapter down to the essentials. A cruel trimming of useless words is needed and I find the music helps me. I don't take it personally I must cut a section, I simply acknowledge it doesn't 'fit' with the scene (musical playlist)
Anyway, that's a glimpse into my writing process using music playlists for each scene. Hope the writers out there can find some kernel of useful action in this post.