Implementation Intentions

Published October 4, 2026.

One sentence that decides in advance what you will do when a moment arrives.

Implementation intentions are if-then plans. They link a specific situation to a specific action: "If it is 7 am on a weekday, then I will write for 20 minutes before checking my phone." Instead of deciding in the moment, you decide ahead of time. Research suggests this simple sentence helps many people follow through.

What the term means

The psychologist Peter Gollwitzer introduced the term. A goal intention says what you want: "I want to write more." An implementation intention adds when, where and how: "If situation X, then I will do Y." Source.

The idea is that the situation becomes a cue. When the moment arrives, the action is already chosen, so there is less to negotiate with yourself.

What the research found

• A broad effect. A 2006 meta-analysis by Gollwitzer and Paschal Sheeran combined 94 independent tests and found a medium to large effect of implementation intentions on goal achievement (d = .65). Source.
• Specific beats vague. In a field study at one company, Katherine Milkman and colleagues prompted employees to plan for a flu shot. Employees asked to write down just a date had a vaccination rate 1.5 percentage points higher than the control group, a difference too small to be statistically significant. Employees asked to write down a date and a time had a rate 4.2 percentage points higher. Source.
• Stronger with mental contrasting. If-then plans are often paired with picturing the goal and the obstacle first. A 2021 meta-analysis of that combination found a smaller but real effect and warned that the true size may be lower because of publication bias. Source.

None of this means an if-then plan guarantees anything. It means it is a cheap, well studied way to make follow-through more likely.

How to write a good if-then plan

1. Start from the goal, written as done. "By May I ran a 10 km race." The plan serves the finish line.
2. Find the critical moment. When does the plan usually break? After work? On Sunday nights? When a certain email arrives?
3. Make the "if" specific. A time, a place or an event you will notice. "If I get home from work" beats "if I have time".
4. Make the "then" small and concrete. One action you can start right away. "Then I will put on my running shoes" is easier to start than "then I will train".
5. Say it, or write it. Read it once out loud. Put it where you will see it.
6. Test it for a week. If it fails, change the cue or shrink the action. Do not blame yourself.

Two kinds of if-then plans

Start plans tell you when to begin: "If it is Tuesday at 6 pm, then I will open my laptop and work on the budget."

Obstacle plans tell you what to do when something gets in the way: "If I feel too tired to go to the gym, then I will walk for 10 minutes instead." These are the heart of the WOOP method.

Most goals need one of each.

12 examples you can adapt

1. If it is 7 am on a weekday, then I will write 300 words before opening email.
2. If I sit down on the train, then I will read ten pages.
3. If I want to check my phone during focus time, then I will write the thought on paper and keep going.
4. If I finish dinner, then I will spend 45 minutes on my course.
5. If it rains on a run day, then I will do a 20 minute indoor workout.
6. If I get paid, then I will move 10% to savings the same day.
7. If a meeting runs late on Wednesday, then I will study at lunch on Thursday.
8. If I start rewriting a draft for the third time, then I will send it as it is.
9. If it is Sunday at 5 pm, then I will do my weekly review.
10. If I feel stuck on a task, then I will write the very next physical step.
11. If I miss a day, then the next day I will do a 10 minute version.
12. If I finish my 45 minute sprint, then I will write it on my done list.

A worked example

Ana's goal: "By April 30 I finished an online data analysis course." Her plan keeps breaking on weeknights, when she is tired.

• Critical moment: weeknights after 8 pm, when she ends up on the couch.
• Start plan: "If it is Monday, Wednesday or Friday at 7 am, then I will do one lesson before work." She moves the study time to the morning.
• Obstacle plan: "If I oversleep, then I will do the lesson at lunch, even if it is only half."
• Check: after one week, she did two of three morning sessions and one lunch catch-up. She keeps the plan.

Common mistakes

• A vague cue. "If I have free time" never quite arrives. Tie the plan to something that happens anyway: a time, a place, or the end of another routine.
• A big action. "Then I will study for two hours" is hard to start when you are tired. Make the first step tiny and let it grow.
• Too many plans at once. Ten new if-then rules are hard to remember. Start with one or two and add more once they feel automatic.
• A plan that fights your life. If you are never home at 6 pm, a 6 pm plan will fail. Watch a normal week first and choose a moment that really happens.
• No backup. Every plan breaks sometimes. A short "if I miss it" plan keeps one bad day from becoming a bad month.

If-then plans also fit neatly into Reverse Journaling. You write the goal as done, work backward to today's action, and then write one if-then sentence that says exactly when that action happens.

Put it to work today

Write one goal as done, find the moment your plan usually breaks, and write one if-then sentence for it. If you need the goal broken down first, the free reverse planner drafts dated milestones backward from a goal written as done. Start From Done keeps your if-then plans next to your daily 45 minute sprint, so the cue and the action live in the same place. The core is free. To find the obstacles worth planning for, try a premortem.

Questions

What is an implementation intention?

An implementation intention is an if-then plan that links a specific situation to a specific action, such as: if it is 7 am, then I will write for 20 minutes.

Do implementation intentions work?

Research suggests they help. A 2006 meta-analysis of 94 tests found a medium to large effect on goal achievement. Results vary by person and goal, and they are not a guarantee.

What is the difference between a goal and an implementation intention?

A goal says what you want. An implementation intention says when, where and how you will act toward it.

How many if-then plans should I have?

Start with one or two for each goal: one to start the action and one for your main obstacle. Too many can be hard to remember.

Who came up with implementation intentions?

The psychologist Peter Gollwitzer introduced the term and studied it with colleagues, including Paschal Sheeran.

Keep reading

• Reverse Goal Setting: How to Plan Backward From DoneReverse goal setting starts at the finished goal and plans backward to today. 7 min read.
• Backward Planning (Backcasting) for Personal GoalsBackward planning, or backcasting, starts from the finished goal and works back to today. 5 min read.
• How to Plan Your Year BackwardPlan your year backward: write December as done, set four quarterly checkpoints, then pick one 45-minute action for this week. 6 min read.
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