We’ve mentioned Parkinson’s Law—work expands to fill the allotted time—already. Well, just as it applies to you individually, it also applies to meetings. You know the default “time blocks” for these: 30 or 60 minutes. But are all discussions so equal that they fit into one of these two spans? Of course not. Reclaim time in your day by setting meetings in 5-minute increments (5, 10, 15, etc.). And make every one of those minutes count by sending a quick agenda beforehand.
Source: Ben Meer