The most common daily use.
WHERE IT HELPS MOST
Difficult emails: declining, chasing payment, delivering bad news, correcting a misunderstanding
Long emails that need shortening Replies to complex enquiries
HOW TO ASK
"Write a reply to this email. I need to [what you want to achieve]. Tone: [how you want to come across]. Keep it under [length]."
Include the original email.
THE MOST USEFUL INSTRUCTION
State what you want to achieve, not what to say.
"I need to decline without damaging the relationship" produces better results than "write a polite refusal".
WHAT TO ALWAYS EDIT
Names and details, which may be wrong Anything factual Commitments, which the model may make on your behalf
That last point matters. Generated emails readily promise timescales you did not agree.
WHAT NOT TO SEND UNEDITED
Anything to a client Anything containing a commitment Anything where tone matters
FOR ROUTINE REPLIES
Build a reusable prompt with your tone and common information.
FOR PERSONAL MESSAGES
Write them yourself. The recipient can tell.