It's best to just practice mindfulness in these periods. Literally just observe the world around you. Or observe yourself, your breath. Be silent and observe the thoughts that fly through your head like you would watch cars go by on a road.

It's a fancy way of saying do nothing. But it's still a productive way of taking no actions. You're appreciating the world you live in and the body you inhabit.

If you can't spare 10 minutes a day for this, then you need a lot more. Those who aren't mindful about their lives end up misaligned - efficient in the wrong direction.