I believe everyone can benefit from this sort of refresher - Kris Spisak’s “5 Commonly Confused Words Starting With A” (on Jane Friedman’s blog). Using words precisely should be the goal of all writers, so there is no shame in revisiting the rules we may have abandoned over time.
https://janefriedman.com/commonly-confused-words/
Anyway…I sheepishly confess that number five on this list caught me – it appears I’ve been doing the no-no of pluralizing a certain adverb most of my writing life.