It's Thursday, so it seems like it is a good time for a Throwback post. Well, actually, I was just thinking about this topic, and rather than re-invent the wheel, I thought I'd re-post something I wrote and shared in 2015. And, when I say "re-post," I usually mean that I copy in the original and then I can't help myself - I edit for readability or I change things that I feel slightly different about.