Most of the time, when I find myself stuck on a problem, I feel like my brain goes through an infinite loop of evaluating/cataloguing what I know about the problem and often stops actually "thinking" about it. I am trying to "see" something new in the data but just forcing my brain against a solid wall.

In my opinion, when I finally give up and go for a walk/chore, my brain is so bored by the boring task that it stops procrastinating and actually focuses on the problem.