As always, Mike Mearls delivers the goods:

Each participant is responsible for entertaining everyone else, regardless of player/GM role.

This is true, obvious, easy to forget and not universally accepted. The best players I’ve gamed with approach sessions this way. As a GM, I know that’s my focus, and with good players it often happens anyway — but I’ve never pushed for it to be everyone’s focus.

When you GM, do you encourage this mindset in your players? Do they come to the table with it without any prompting? When you play, do you take this approach?