If some event happens and it seems really important to me and moving to me, I'll write it down in my lyric book knowing that it will come out in a song.
I sit down and draw from my lyric book. I sit down and start looking through it and see if there is anything that strikes me that I've written.
I have a lyric journal that I write in a lot. When I'm going to play, I just sit down and have my books with me and my notes and tapes and whatever I need to refer to. I just play and try different things. It's a kind of discipline.