Regret is a topic too big to cover in one little blog post. It’s too big to cover in two little blog posts. But we do what we can, right? When most people think about regret, I’d bet it’s not to re-hash the stupid things they’ve said, as I discussed in Truth and Regret. It’s not to beat themselves up over the questionable things they’ve done (boy-short haircut of 1999, I’m looking at you). The hardest regret to make amends with is regret for the things we did not try, say, or do—the risks we did not take. Oh, boy. Did I say that I was going to tackle this in one blog post?   This is a topic I think about often, not…