I analyze everything and separate into two categories: the good / instructive and the crap. My focus, however, is on the good and instructive. In other words, I try to separate out the crap specifically so I can focus and "dwell" on the good.
I even did that when I was driving a lot in areas where the only radio stations were local religious programming. I would listen to the sermons and say, "Crap. Crap. Crap. Oh, cool, I hadn't thought of it quite like that. Crap. That's interesting. WOW; great way to phrase that. Crap. Crap. Crap. Crap. OK, had enough." Then I would spend my free time on the drive thinking about the parts of the sermon that were insightful and instructive. I have written some excellent talks while I drove, and many of them were inspired by sermons from ministers that, frankly, were quite crappy overall.