If I have a large number, I go through the categories I think I would use, then go through them one by one to bring a song to mind. Conversely, if I need a style for a particular song, I look at the most logical category and choose the closest. There are times, however, when I want a more modern beat to a standard, and look to different styles, or, I may go to a "Music Finder" to see what they suggest, if I am not sure of the song.