I seem to have worded the bit about "four out of seven" poorly -- it's just meant to be a sort of confidence interval, but people seem to think I'm jealously hoarding my pile of three extra advice themes which I (for some reason) refuse to share with you all. I don't know what they are. If I had three more themes, I'd have listed them, and then said I had "seven out of twelve" or something like that. It's precisely because what's salient for me may not be so for others that I'm trying to be humble about how many of the top themes I've managed to identify.