For a site that publishes tips on how to be more productive, it can be a little too easy to waste time reading Lifehacker. But if there’s one piece there worth getting lost in this week, it’s a Q. and A. with Ira Glass, host of “This American Life.” Mr. Glass meticulously details his religious propensity to cut out all that is unnecessary, and gives light to the things that are worth their salt in this world.