A couplet, in poetry, consists of two consecutive lines that rhyme with one another. First, you need to determine the idea that you would like to convey. Next, you need to write the first line of the couplet. You can write it in different ways, that way you can decide which one can end with a word that is easy to rhyme with. After determining your best first line, write your second one, ensuring that the second line’s last word rhymes with the first line’s last word.