I know I must be getting older because of Friday nights. I also know that I'm getting older because (1) there was no new post yesterday and (2) even today this post will look familiar to a significant number of our readership. Mea culpa, but trying to put the finishing touches on two R01 grants I've been working on takes a toll. Who knew? Things should get back to normal tomorrow or Friday at the latest. Be that as it may, let's get back to Fridays. After a long, hard week (and, during grant season, in anticipation of a long, hard weekend of more of the aforementioned grant writing), it's not…