At the moment I'm shortening the chapters. A tacky softcover thriller I've already forgotten most about taught me one thing a few years ago – short chapters encourage the reader to go on. If they're into it, it's only one more short chapter before they have to put it down and finally go to sleep.
To my surprise, I've actually been very good about keeping the chapters short without realising, and I've hardly had to split anything. I still need to system card the whole thing though.