It is hard to be productive and feel productive when you are stuck in a unproductive meeting.
But what you can do is break the script. Change the expectations. Think and do things differently compare to the rest of people who allow themselves to be bored.
My philosophy is that life is worth living and then it is important to live better and improve yourself.
If we all do what everyone is doing, then we risk to be as mediocre as everyone else.
Don’t settle for mediocrity. Do things better than others and create a better life for yourself. In that way, you can become productive with your time.