So the joke from Spinal Tap has worn a bit thin, I realize, but this is such an excellent resource that I’m not too worried about needing the perfect hook.
Namely, Faculty Focus has published an end-of-the-year Top 11 Teaching and Learning Articles, which seems like a perfect occasion to direct your attention to this high-quality resource. I also recommend that you sign up for their free newsletter (aka, listserv), which you can do via the form on the right side of their page.
The Faculty Focus newsletter provides a judicious and manageable stream of e-mails with brief but insightful (and minimally booster-ish*) explanations of advice about teaching. Articles usually emphasize issues specific to online but always address them with a mindset that remembers that learning and teaching retain some fundamental identities whatever the medium. It is neither the be-all nor the end-all of teacher PD, but I find it to be a useful regular occasion to re-learn or re-think.
*While “less booster-ish,” their free newsletter does recommend paid services from time to time.
If you have similar resources you find particularly helpful, please recommend them in the comments below, along with a brief explanation of why you find them useful.