I picked up the habit of doing this manually a couple years ago, when my meeting load mushroomed following a reorg. I also started getting assertive about declining meetings if I thought they were asking for too much time. Too many folks were in the habit of reflexively blocking out a full hour for a decision that could be made in 15 minutes plus a briefing email that everyone could be expected to read ahead of time.…
I have often thought that it would be great to limit the amount of meetings any person could organise on a monthly basis via some quota (say 6 hours a month). Everyone who wanted to organise a meeting over some trivia would then be forced to think twice - do I really need a meeting for this?