ChatGPT Prompts for Work: A Library Sorted by Job-To-Be-Done

Quick answer. A useful prompt library is organized by job-to-be-done — not by tool. Below: structured prompt patterns for emails, summaries, research, planning, and decisions, each with the customization you actually need.

The pattern every good prompt uses

Skip 'act as a world-class…' theatrics. Every prompt that consistently produces good work has four parts: a role tied to your context, a task with a measurable output, hard constraints, and an output format.

Anything else — examples, voice samples, references — is optional polish layered on top of those four.

Library by job-to-be-done

• Email — replies, outreach, escalations, tough conversations.
• Summaries — meeting notes, articles, transcripts, threads.
• Research — competitive teardown, user-interview synthesis, market scans.
• Planning — weekly priorities, project kickoff, sprint reviews.
• Decisions — option grids, pre-mortems, trade-off memos.

Example: from generic to specific

How to customize any prompt for your context

1. Add your role and the audience you're writing for.
2. Add 1–2 banned phrases or 'never do this' lines.
3. Add 1 reference (a past email, a brand voice sample, the source doc).
4. Constrain length: word count or sentence count.

Mini checklist

• Save your top 10 prompts somewhere you'll actually reopen.
• Tag each by job-to-be-done (email / summary / research / planning / decision).
• Add a 'voice sample' note to anything customer-facing.
• Re-prompt monthly: models update, your patterns should too.