Meetings can be a good thing or they can be a total waste of time. it really depends on who is invited to the meeting, how many people are attending and how well the meeting purpose is defined. Most of the meetings I attend at work are design meetings, that have the tendency to go on forever (way beyond the time that was planned for them) and to end without a any concrete desicions (especially if there are 2 or more people with a different opinion on what should be done). I especially "love" meetings where you have to go through a document or presentaiton and never get passed the first page/slide.
Also, I beleive there should be global rules as to when to schedule a meeting, I really hate it when I have meetings during lunch hours, too early in the morning or too late in the evening...