Agendas are vital to a great meeting. It confirms to the facilitator why the meeting exists and tells the attendees what to expect.
Maybe attendees need to bring their calendars, maybe they need to bring materials. Maybe they need to think about the agenda beforehand.
Empower the attendees so they come prepared. Best not to not put too much on the agenda, and keep topics somewhat connected. Three to four items work well and keep the agenda on track. A tight agenda shows that you respect everyone's time.
