Take the book closest to you. Turn it to page 23. What is the first sentence of the first complete paragraph? the first five words of it are your first line. Take it from there!
Create a pantoum with as many lines from your favorite television show theme song lyrics as you can (I like using lines from "The Love Boat" and "Gilligan's Island," but hey, use whatever you like!)
Write a pantoum where you name as many fruits as you can. And yes, a tomato is a fruit.