Make it simple on yourselves. Look at something, an object, think of where it is and where its been, who would use it and what the story is behind this person. The idea or ideas that made the oject come to life or get there. Will the wind blow it or is it solid, weighty, through some emotions in you have at the time. I personnaly think everything can provoke a song. Think of all the matter around us, you won't nessecerely write about that, but it will definately inspire a train of thought, and oh yes, I agree with the others, drink!!!