I know this is an older thread, but one thing I learned is to stick to the clock. If I schedule a 10 minute break, the break is 10 minutes. As soon as the break is over, the clock is running, and if no one is at the table, I’m dealing cards to empty seats and auto-mucking absentees.
If you don’t do that, people will turn 10 minute breaks into 20 minute smoke breaks, or run down to the convenience store for a snack, or just hang out and chat.