I saw that article, but I couldn't quite understand the premise. Obviously it doesn't matter if the password rhymes or is metrical, except as a memory aid, but surely there are equally long prose phrases that are easy to memorize. Something mundane like "Yesterday I left my keys on the dining room table" should be just as strong a password and not at all difficult to memorize, no?*
Esther, you can just come up with your couplet and routinely add, say, the number 9 at the end. And for sites that require at least one capital letter, you can routinely start your couplet with a capital letter.
*I tested this password
here and confirm that it is 100% safe. Using that site to experiment, I found that the use of at least one capital letter makes a wide variety of phrases into perfect passwords. And if you slap a single number on the end, you can use notably shorter phrases to achieve that result.