Frequently, I go straight into the studio and see what's around. I might hire a couple of instruments that I've never used - maybe a particular type of electronic organ or an echo unit. Then I just dabble with sounds until something starts to happen that suggests a texture. The texture suggests some kind of mood, and the mood suggests some kind of lyric. That's like working in reverse, often quite the other way around, from sound to song. Although often they stop before they get to the song stage.