Use commitment devices to make future behavior harder to avoid
Pre-commit to the behavior now — when your current self is motivated — to bind your future self.
Why it works
Commitment devices exploit the temporal gap between intention and behavior by using current motivation to constrain future options. Removing the ability to defect later (by paying in advance, removing an exit, making a public commitment) shifts the decision from "do I want to do this now?" to "I have already decided." This bypasses the in-the-moment motivational comparison that causes intentions to fail. Richard Thaler and others have documented the effectiveness of commitment devices for savings, health, and behavior change.
How to do it
- Identify the future moment when your motivation to defect will be highest — the classic "I’ll start tomorrow" point.
- Design a constraint: pay for the behavior in advance, make a public commitment with stakes, give authority to a trusted person to hold you to the plan.
- Keep the constraint proportional — harsh penalties produce anxiety and workarounds rather than compliance.
- Use commitment devices for behaviors where the benefit is long-term and the temptation to defect is predictable.
Evidence
Commitment devices have RCT support in health behavior contexts, including smoking cessation (savings-linked commitment) and exercise adherence. (rct)
Commitment devices can backfire if they are experienced as controlling rather than autonomy-supporting, reducing intrinsic motivation (consistent with self-determination theory). Use for instrumentally motivated behaviors.
Sources
- Giné, Karlan & Zinman (2010), "Put your money where your butt is: A commitment contract for smoking cessation," American Economic Journal: Applied Economics
Common mistake
Designing a commitment device that is easy to circumvent — a commitment that has a low-cost exit is not a commitment; the constraint must be real.
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More practices for Action Planning
- Write when, where, and how plans for every behavioral goal
Specify exactly when, where, and how you will act — not just what you intend to do.
- Plan for obstacles with coping plans
Anticipate the specific obstacles most likely to block your plan and pre-decide your response to each.
- Decompose distal goals into proximal action plans
Break long-term goals into short-term action plans with specific behavioral targets for this week.
- Review and update action plans at a fixed weekly cadence
An action plan that is not reviewed weekly becomes stale — regular review keeps the plan matched to current reality.
- Mentally simulate the planned behavior in its specific context
Rehearse the action plan in your mind — visualizing the cue, the response, and the environment — to prime automatic execution.
- Test your action plan for specificity before relying on it
Before counting on a plan, check that a stranger could execute it from your written description — if not, it is not specific enough.
Related concepts
- Atomic Habits, Made Practical
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- SMART Goals That Actually Move
Each letter, the mechanism behind it, and where the checklist quietly limits you
- WOOP: Wish, Outcome, Obstacle, Plan
The four steps, the science of mental contrasting, and why fantasy alone fails