At the most extreme, some forms of constrained writing are even more self-limiting and end up being very, very constrained ...

You can work out the rhyme scheme of a poem by labelling the words that rhyme with each other. It will help you see the pattern of the poem. For example, if a poem's first and third lines rhyme ...

Here are two examples, one in triple meter ... you might want to abandon couplets in favor of an abab rhyme scheme or any other through-moving sequence. But let’s take a different tack.