I supppose I've done it lbeit in a small way. I wrote a song about my home town Kilkenny in Ireland called Singing In Kilkenny, did very well there and they even framed it and put on the Mayor's office wall, and it's often sung there at sessions. Thing is it came to me in a flash of inspiration one day and it took only about twenty minutes to write, 4 good verses. BUT! I've not really been able to write anything worthwhile since so I have no formula to offer ;)