If you're responsible for holding meetings and they're not effective, for your own sake and for all the attendees whose time you're wasting, now is the moment to get a grip.
The easiest way to do this is to apply the six 'wisdom access' questions to the problem, starting with the most important of all: why? Once you've clearly established the purpose of the meeting, everything else is easy. After all, form follows function.
are we having this meeting?