Rehearse your talk to time

Summary

This pattern is for anyone giving a short, timed presentation at a conference, seminar or meeting. It describes how to shape and rehearse a talk so it fits its slot with room to spare.

Recommendation	Why?
Decide your one main message before making slides.	A short talk can carry one idea well, and everything else should support it or go.
Treat about one slide per minute as a ceiling, not a target.	More slides than minutes almost always means rushing, and some slides need longer than a minute.
Rehearse aloud with a timer at least three times.	Talking through it in your head is much faster than speaking, so only aloud rehearsal gives a real time.
Cut until your rehearsal takes about 90% of the slot.	Live talks tend to run longer than rehearsals, because of nerves, technical hiccups and pauses for the audience.
Mark one or two slides you can drop if you’re running late.	You can recover time calmly instead of speeding up or skipping your conclusion.
Check the room, projector and clicker before your session.	Connection and display problems are common and much easier to fix during a break than in front of an audience.
Bring a backup copy of your slides in a second format.	If your laptop or file fails, a copy on a USB stick or in cloud storage, plus a PDF version, keeps you going.

Context

This pattern suits conference talks, lightning talks, short seminar slots and project updates where time is fixed and shared with other speakers.

It does not suit a long lecture or workshop, where pacing is more flexible, or an informal discussion with no slides. For a meeting where you have an agenda item rather than a talk, see No agenda, no meeting.

There’s a trade-off between content and clarity. Including every result feels thorough, but the audience remembers less. This pattern favours one message delivered clearly. If your audience will read a paper or report afterwards, point them to it for the detail.

Usage

Shaping: write your main message in one sentence. Sketch a beginning (why it matters), a middle (the evidence or example) and an end (the message again, and what you’d like the audience to do).

Rehearsing: run the whole talk aloud with a timer, ideally once in front of a colleague. Note where you run long and cut there. Repeat until you’re consistently at about 90% of the slot.

On the day: check the room in an earlier break and load your slides. Plan the session around your slot using Plan your conference, leave gaps. Keep a watch or timer where you can see it, and if you’re behind at the halfway mark, drop your marked slides.

References

Conference organisers usually send speaker instructions with slot lengths and technical details. Many universities and professional associations also publish presentation-skills guides.