Twenty subject lines in four minutes
Not twenty variations of one idea. Twenty angles, then you pick, which is the part only you can do.
Asking for twenty subject lines gets you one idea rewritten twenty times. The trick is to specify the angles rather than the count.
Why angles beat volume
Variations of a weak idea are all weak. Angles force genuinely different starting points, and one of them will be better than the one you had.
You still choose. That has not been automated and should not be.
What to do with the output
Shortlist three, then read each aloud using the voicemail test. Usually two die immediately and the survivor is the one you send.
Angle generator
# Subject line angles Email purpose: [ ] Audience: [ ] Give me ONE subject line for each of these angles. Do not repeat an idea. 1. The direct one, no cleverness 2. A number or specific figure 3. A question the reader is asking already 4. Bad news framing 5. Curiosity gap, no clickbait 6. Named person or company 7. Deadline or timing 8. Contrarian take 9. What this saves them 10. The one you would send to a friend Max 7 words each.
Four minutes, ten angles, one decision. The decision is still yours, which is the only part worth your afternoon.
Promptly 22 Jul 2026 3 min