Do you take the jet-laggedness (I know, not a word) of your meeting's attendees into account when you're scheduling sessions? If not, you should be. Not just to be nice and considerate of those who come from other time zones, but also to maximize their learning. And why might that be? Well, we've always thought it was the case, but now we know for sure that jet lag makes you stupid (at least, it does if you're a hamster).