I made a logical order of songs as well. It’s not a concept album, but since there’s recurring themes on both Audio Guides to Happiness, I made use of that. Of course I included tracks from their first album as well, since the requirement was songs from at least three albums. I then ordered the songs in a way that would make it a pleasant listen (ie, not all heavier songs after each other, switching some stuff around). I listened to what I made over the past week and weekend and was pleasantly surprised myself at the flow and cohesiveness.