When I was first invited to comment about the importance of sleep for overworked people, I initially declined. I was tired of re-threading a worn tyre and offered to reconsider, if something worthy came to mind. And then, lightning struck.

I recently made an arduous but satisfying long-distance trip whose preparations were demanding. However, as the presentations were well received, and I could take a break after working so hard, I had expected to coast along from there.