I think the most important part of a composition is the idea behind it. The craftsmanship is also important but at this point in history there is of course vastly amounts of music already; and to justify the creation of more music I think you have to back up with a pretty good idea. What then is the nature of this idea that I seek? I have previously written about musics current relation to art (e.g. art and music and music art) and I think it is very interesting taking a conceptual artists view in creating the idea. But the idea can also be of a more esthetic nature (compare with a clarification). A conscious limitation can be an interesting start; to use chance or rules can also be interesting from a conceptual or esthetic point of view.