Sense Writing
Sense writing is a writing exercise that is useful for generating raw material
for lyrics.
The process is broken down very well in this video:
Sense Writing Video
This is a tool that generates a random sense writing prompt and provides
a timer. You should write continuously for 10 minutes. The idea is to
write without stopping, without editing, and without worrying about
grammar or spelling. Just write. And stop. That part is important.