Best Strategy for quick meetings???

I have been stuck with this problem for a looong time. My manager schedules meetings for 'quick 10mts' and it goes on and on. It always overshoots by a minimum of 50%.

What are the quick and easy techniques to have fixed time meetings?

My ideas:
1. Make it a standup meeting instead of people sitting and listening to it
2. Have a small alarm or bell(subtle) to ring at the end of the meeting time

any more ideas????