I have too much music on my iPod! It’s impossible to figure out what to listen to. Recently I have started building play lists that fit a particular mood (e.g., “fun vacuuming songs”, “rainy day smooth”). But, it’s a pain. It takes forever going through my library and listening to all my songs long enough to determine what list to assign them to. What I’d really like is to be able to just turn on shuffle and when a song jumps out as something I’d like to add to a play list, I could do it. It could work similar to how you build an On-The-Go play list, but would allow you to assign to one already existing.