[nicbou]

> That includes canceling meetings we were invited to with a "nah this can be an email"

I've done this, and it went down really well. Even if you can't cancel the meeting, you can send a single person instead of the whole team. You can also send people back to their desks if their part in the meeting is over. I was also adamant on all meetings having some sort of description and agenda, so that people can tell if it's worth attending or not. That was more difficult.