I embrace the extremes. I am naturally curious, and I will let myself go down rabbit holes of fascination. When I need to concentrate, I will go through a little ritual of setting do not disturb on things, closing non-work tabs and programs, putting "focus" music on, planning my little bit of work, and maybe doing a little mindfulness exercise. I find this gets me into flow for a bit, and I think finding one's own process for getting into flow is useful.

And I take holidays deliberately to "unplug" and read. I go somewhere quiet and scenic, no computer - just a book (or several). I do take a tablet, but its basically only got a book and comic/manga reading app on it.