I like the "one task that wastes time every week" advice. One thing that makes it stick: before you try a tool, time the task three times and write down what a good result looks like, for example "reply under 5 minutes, correct price, no promises we can't keep". Then after a few weeks you're comparing against a real baseline, not a feeling.

For the follow-up area, a simple setup is to let AI draft the check-in from your notes, but have a person click send and own anything about price or dates. Also keep a short log of the drafts you had to rewrite and why. After two weeks that list tells you exactly where the human has to stay in charge, and it's usually the same three or four situations.