The first time that I was pressed into being a project manager was at a subsidiary of a new telecom company.
We inherited some basic rules
1. Whoever called the meeting had to prepare the info for the meeting and send it out to the participants at least a day early
2. The meeting could be no longer than thirty minutes
3. Whoever called the meeting would prepare a summary and send it out to all participants with a list of action items before the end of the day
The unwritten rule was that if you started wasting people's time they would stop coming to your meetings
This put the power into the hands of the people doing the work and made the PM a servant to getting work done
That is how is should be, I cannot tell you how many times I have wanted to apply the 'unwritten rule' and walk out on some PM that was just sucking all of the intelligence out of the room and keeping people from working