From an interview with the creator of Brain Pickings:

When you intercept the rumination process with something that requires your full attention—that’s stimulating and absorbing, that places a demand on your intellectual focus—you don’t get to ruminate. In a way, it’s a mental health aid to be able to do that so much. My routine, what I do, it just feels like home. It’s my comfort food.

Maria Popova’s Beautiful Mind – Mother Jones