It's got to be a good agenda, too. It can't just be "discuss delivery of project X" or "sync on status of feature Y". Those are too generic. The agenda needs to make it clear what the outcome of the meeting is, and who needs to be there.

I'm the only person I know of who writes real agendas for meetings at my company (which is only about 120 people). It's clearly not caught on, but I do it anyway almost as a protest at this point.