Blame Denise Weuve.
Make a list of things you've done or been in your life. Weightlifter, toll booth operator, poet, occupier of office chair. Purveyor of the occult.
Whatever. Feel free to invent titles if it helps you out.
Write a three part poem detailing your lives. They can be an overview, or focus in on a detail or incident in your life.
Explore how they connect, or conflict with one another.
Alternately, write a three part poem about the lives you might have had. Your life as an astronaut, or hockey goalie. You, the Olympian, the first man or woman on Mars. Getting strapped to a nuclear missile like Slim Pickens. You get the idea.