Award-winning poet Suzanne Buffam will help you write a poem with a friend. Try it!
One exercise I love is to collaborate with a friend. One person writes five questions — “What is love?”, “What is anger?” Etc. — phrased as definitions using abstractions. Without reading the questions, the other person writes five strange and beautiful images: “two detective novels lying open on the bed”, “a jar full of smoke”, “wind in a box”, etc. Then read them aloud for the big reveal — magic every time.