Harder Practice Principle
Make rehearsal tougher than the performance you must deliver
- Difficulty
- Moderate
- Time to result
- ~weeks to results
- Steps
- 5
- Confidence
- 91%
The Harder Practice Principle deliberately makes rehearsal more demanding than the event being prepared for. Define the performance and recruit credible people who are more sceptical, exacting, or intimidating than the likely audience. Ask them to grill the argument, expose weak answers, and create pressure while failure is still cheap. Record where the pitch, explanation, or delivery breaks, revise those points, and repeat. The mechanism converts discomfort into margin: after surviving sharper criticism and more difficult conditions, the real performance requires less cognitive and emotional capacity. Rigour matters more than cruelty; the critic must reveal fixable weaknesses rather than merely demoralize the performer. The exercise works when the demanding rehearsal produces specific improvements and makes normal conditions feel manageable.
Origin
Before entering the academic job market, Leslie John asked the faculty members she found meanest, grumpiest, and most sceptical to grill her research pitch.
Core principles
- 01Comfortable practice leaves predictable weaknesses untested
- 02Sceptical feedback exposes flaws before the real event
- 03Emotional discomfort can be useful preparation
- 04Rehearsal should exceed the difficulty of the target performance
How to run it
- 1
Specify the Performance
Define what you must deliver, to whom, and under what likely pressure. List the questions or failures that would matter most.
Pro tip Rehearse the exact format rather than a vague version of the task.
Watch out You cannot make practice usefully harder without knowing the target.
- 2
Recruit Rigorous Critics
Choose credible people who will challenge assumptions and resist easy answers. Explicitly ask them not to protect your feelings during the simulation.
Pro tip Select critics with expertise relevant to the audience's likely objections.
Watch out Rigour is not the same as humiliation or hostility.
- 3
Raise the Difficulty
Run the rehearsal with sharper questions, tighter constraints, or more scepticism than you expect on the day. Continue through mistakes instead of restarting immediately.
Pro tip Add one source of pressure at a time so failures remain diagnosable.
Watch out Random difficulty that does not resemble the real task creates noise, not preparation.
- 4
Diagnose the Breaks
Capture every place where the content, reasoning, or delivery failed. Convert each failure into a specific revision or drill.
Pro tip Ask critics which answer first reduced their confidence.
Watch out Enduring discomfort without changing the work is not improvement.
- 5
Repeat to Margin
Rehearse the revised version until it survives the difficult simulation. Then confirm that the expected performance conditions feel easier by comparison.
Pro tip Finish with one realistic full run after the stress rounds.
Watch out Stop before fatigue degrades the skill you are trying to strengthen.
In the wild
A founder preparing for an investor meeting asks three experienced operators to challenge the market assumptions, pricing, and retention claims more aggressively than the expected investors. She records the questions that make her ramble, tightens the evidence, and repeats the panel under a shorter time limit.
→ The real investor questions feel familiar, and the founder answers them concisely with evidence.
Common mistakes
Rehearsing Only With Supporters
Friendly feedback can leave the hardest objections undiscovered until the real event.
Choosing Cruelty Over Rigour
A critic who only attacks the performer provides stress without useful diagnosis.
Failing Without Revising
The simulation creates value only when breakdowns become concrete changes and another tested attempt.
Is it for you?
Best for
It is best for important performances where difficult questions and sceptical audiences can be simulated in advance.
Not ideal for
It is not ideal when critics are abusive rather than rigorous or when repeated stress practice would create injury or burnout.
From the transcript
“I went to the meanest, grumpiest, most skeptical faculty members that I'm most intimidated by and I was like, "Please grill me on this."”
“you need the practice to be harder than the performance, right?”
From the episode
Episode 531: Leslie John: Oversharing as a Competitive Advantage in Leadership and Negotiation
Leslie John