The reader cares what happens to the protagonist and becomes personally involved in the action of the plot. In my opinion there are two major sources which work together to produce that seed idea which will grow into a hit song. The first source is Life. The second is Music. Think of your mind as a computer which has been programmed with certain Life and Music software.
Nothing springs spontaneously from the computer itself.
Let's look first at Life. They look beneath joyful experiences and find lessons in difficult ones. Instead of using all their emotional energy to fight against the circumstances they are facing, they let those experiences carry them into new understandings new sensitivities and, ultimately, into new creativity. I recently had the privilege of interviewing hit songwriter, Jason Blume, at his home in Nashville for my syndicated radio program, I Write the Songs . Jason told me a story and played me a song that perfectly illustrate the point I am struggling to make.