When the meeting is running long, but not quite done, when to adjourn, it's time to bring out the big guns: adjournment tactics, adjournment statistics, adjournment ethics.
Don't be that meeting leader who says "just 5 more minutes", no one likes that guy. Learn more about meeting leader adjournment strategies.
And remember, adjournment is not just a meeting thing, it's a life skill. Read about adjournment in the real world.