Give it a document and interrogate it
I've attached a document. Before you summarise anything, tell me what kind of document it is and what it's for. Then give me the three things in it most likely to matter to someone who has to act on it.
Why this one: The single highest-value thing a beginner can do, and the thing generic chatbot advice never mentions.
Tweak: Ask it to quote the exact passage behind each point, so you can check it rather than trust it.

