The WOOP plan: writing an if-then that fires on its own.

By the time you reach the fourth step of a WOOP, most of the hard thinking is done. You have a wish that matters, a picture of the best outcome, and an honest obstacle from inside you. What is left is one sentence: if that obstacle shows up, then I will do this. It looks like the easy part. It is also the part people most often write badly, and a badly written plan is the difference between a woop that quietly changes a week and one that evaporates by Tuesday.

What the plan is for

Peter Gollwitzer, the psychologist who spent decades studying this kind of sentence, calls it an implementation intention. The idea is simple and slightly strange. A goal intention says what you want: I will walk more. An implementation intention says where, when and how: if it is eight in the morning and I have finished my coffee, then I put my shoes on and go. The second version does something the first cannot. It hands control of the behaviour to the situation. When the cue turns up, the response is already attached to it, so it runs without a fresh decision. Gollwitzer's own phrase for this is that the plan delegates control to the environment, and the point of the whole step is to make that delegation as clean as possible.

A good plan is one you do not have to remember, because the moment itself reminds you.

Why trying harder is not a plan

The most common fourth step sounds like this: if I feel like skipping, then I will push through. Or: then I will remember why it matters. Or the shortest version, then I will just do it. These are not plans. They are restatements of the wish, wearing a plan's clothes. Nothing in them tells your future self what to do with their hands. Worse, they ask for the one resource the obstacle has already taken, which is willpower. Obstacles arrive when you are tired, rushed or discouraged, and a sentence that asks you to be more determined at exactly that moment is asking for something you have already established you will not have.

The test is physical. Could someone watching you see the then-part happen? Putting your shoes on is visible. Opening the document is visible. Trying harder is not, and so it gives the moment nothing to fire.

The cue comes from your obstacle

The plan's if-part is not invented at step four. It was found at step three, and that is the quiet genius of the order. Suppose your wish is an hour of focused work before lunch, and your honest obstacle is the pull to check your phone when the work gets uncomfortable. The plan writes itself from there: if I feel the pull to check my phone, then I put it in the other room and come back to the sentence I was on. The obstacle becomes the trigger. What used to be the moment things fell apart is now the moment the plan begins.

This only works if the cue is specific enough to recognise from the inside. The pull to check my phone is something you can feel arriving. Getting distracted is not; it is the name for something that has already happened. So describe the obstacle the way you actually experience it, in the first second of it. A tightening in your chest. Reaching for the remote. The thought that you will start after one more email. If you found the obstacle honestly, that first second is usually already in your notes from step three.

If-then or when-then

The research literature uses the if-then form, and Oettingen's own WOOP materials do too, but you will see when-then in a lot of adaptations. They are not quite the same thing, and the difference is useful. When-then suits cues that will certainly happen: when I sit down at my desk, when the alarm goes off. It is a good way to attach a new habit to a fixed point in the day. If-then suits cues that might happen, and the inner obstacle from step three is almost always one of those. You do not know that you will feel the pull to check your phone, only that you probably will. If-then keeps the sentence honest about that, and it makes the plan a response to the obstacle rather than a schedule. Use whichever matches the cue. What matters is that the cue is concrete and the response is an action.

One plan per woop

It is tempting, once the form is clear, to write three or four plans for every obstacle you can think of. Resist it. A woop carries one wish, one obstacle, one plan, and the single plan is stronger than the set. Part of this is cognitive: a cue-response pair is easy to hold, and a list is not. Part of it is evidential. Studies that gave people several implementation intentions at once have found weaker effects than one, possibly because the cues compete for attention, and possibly because writing many plans is itself a way of not committing to any. If the obstacle you found at step three is real, it will keep coming back, and one rehearsed response is what you want waiting for it. If you notice a second obstacle, that is a second woop for another day.

One wish, one obstacle, one sentence you could hear yourself say.

When the plan did not fire

Some plans do not work, and the useful response is curiosity rather than a verdict on your character. Go back to the sentence and ask which half failed. If the obstacle turned up and you did not notice it until afterwards, the cue was too vague, and the fix is to describe the first second of it more precisely. If you noticed the cue and still did not act, the response was too big, too far away, or quietly still a form of trying harder; shrink it until it is something you could do half-heartedly and still have done. If the obstacle never turned up at all, look further back. Perhaps the real obstacle was a different one, which is a step three problem, or the wish was not one you actually wanted this week. None of these are failures of the method. They are information, and a woop that is revised once usually works.

What the evidence shows

Implementation intentions are among the most tested ideas in the psychology of goals. Gollwitzer's 1999 paper in American Psychologist set out the mechanism and was titled, accurately, strong effects of simple plans. In 2006 Gollwitzer and Paschal Sheeran gathered every test they could find into a meta-analysis: 94 independent studies, covering over eight thousand participants and goals from exercise and screening appointments to recycling and exam revision. The overall effect on goal attainment was medium to large, with an average d of about 0.65, and it held across both laboratory and field settings.

Two honest notes. The effect is an average, and it is larger for people who already want the goal than for those who were told to want it, which is why WOOP puts the wish first. And a plan makes the action more likely, not certain. It is a tool for the moment of friction, not a promise that friction disappears. Luvia's guided WOOP in its rituals walks you to the sentence and keeps your woops together so you can revisit one that did not fire, though a notebook does the same job.