I don't sit down to write a song; they just come to me from something that somebody says, or something in the news. The punchline comes to me, and I go over it in my head and get the song form. I hadn't been doing that a lot.
You always want to write the perfect song. But no one will ever write the perfect song, I guess. I would just like to write on that has all the elements of what I'm tring to do. And I'm working on it. I'm always working on it.
If it's worth remembering, I'll remember it. If something keeps coming back, if I keep thinking of that phrase, if I see manifestations of it at different times and different places, then I feel it's worth making a song out of.
I start out with words, with the idea, the line. Then after I get a line or two, I try to find what melodic line those lines would be suited to. As soon as I find the form I can finish the song in my head.
I never sit down and write. I just sorta let things form in my brain.