Ending meetings on-time is impossible for many people. How could you make it even easier to make sure your next meeting stopped at the right time.
How about if your conference table disappeared by the time the meeting time ran out. The table would start lowering itself with 5 or so minutes to go and by the time the meeting was supposed to be up it would be completely level with the floor.
If that doesn’t end your meeting maybe you could have a paint grenade go off at just the right time so everyone would be sure to get out.
How would you end your meetings? Please just don’t have them in the first place.