You can add another two important items to your list, Tomasz.
11 Only invite people to the meeting who need to be in the meeting. Don't invite everyone, only to have a meeting that is only relevant to a specific team or group of people.
12 If the meeting spills into lunch, either postpone the meeting or if it is important, feed everyone. you don't want to be in a meeting watching the clock tick away as the energy depletes as hunger sets in as you start to eye-off your coworkers as lunch options.
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