Check the availability of the other guests before sending the invite (Unless sending it as a tentative hold)
Be sure to invite everyone directly by adding them to the calendar event so they can see changes that might occur (i.e. don't forward invite emails)
Unless there's a good reason, make the event editable by guests so they can add details or move it in a pinch
Try to include any related materials/instructions in the notes field so that everyone has the resources they need to participate
Make sure you accurately update your RSVP status to any events you're attending/invited to
If you indicated that you're going to make it, show up on time
If you can't make it, try to give maximum notice via email and update your RSVP status
If you're running the meeting: If you can, try to end the meeting on time, because attendees likely have other meetings scheduled straight after that one