I don't know if this is actually a good way of doing it--I suppose we'll see when I have to edit the mess--but my WIP has become something of a rhythmic monster.
Slipping into the character and his voice (it's first person) means the sound of the words, the rhythm, becomes the order of the day. Sometimes I find myself adding words, redundant ones, just so his voice flows the way I want it. Assonance, alliteration, rhythm and rhyme all come into play. And to me it seems very effective, even if what he says, the "meaning" of it, really isn't exactly what I intended. It fits because the "sound" of the words is right.
Besides, it's not what you say, it's how you say it. On paper, with the written word, we don't have tone of voice and inflections to give clues to meanings. We have to use what we got, and that boils down to rhythm, alliteration, assonance and the like. The beat of the words, how they fall onto the page. I think it can add tremendous meaning.