For boring reasons I don't feel like using Boomerang to remind myself, but if you message me in a year (and I still have an active LW, and insert other obvious caveats here) I'll write the post and/or post significant comments on the retrospectives of other attendees.

ETA

Upvoted for writing this before reading the main post. Is that the sort of technique they taught you?

Short answer yes. Long answer, it is the obvious converse of some of Julia's techniques for soliciting useful advice on the other hand they did not directly suggest it for giving good advice, and I suspect I would have thought to do it even if I had missed that session. Its a pretty obvious idea (at least to me).