When to use it
Use it when you want to suggest an improvement to something your manager runs. Turn it into a small request that also helps you do better work. It's easy to say yes to and doesn't feel like criticism.
Example
You: “Could we share an agenda before our weekly meeting? I'd come better prepared.”
Manager: “Good idea. I'll put one in the invite.”
In an email or Slack message
In Slack: “Idea for our weekly: could we drop agenda items in this thread by Monday? I'd come better prepared.” Offering to start the thread yourself makes it even easier.