The Three Good Things Exercise, Step by Step

2026-10-25 · Yesterself

Most people who try the three good things exercise do half of it. They write the three things, feel mildly pleasant about them, and close the notebook. The half they skip is the half that does the work.

The exercise, usually credited to the psychologist Martin Seligman, who has also called it "What Went Well," has two moves per item, not one. First you name something that went well today. Then you write a line answering a specific question: why did this happen? Three items, three explanations, six lines total. The naming is the easy part. This article is about the second line.

Why the causal line is the exercise

A gratitude list is a list of nouns. Coffee. My sister called. The rain stopped. It is a fine thing to write, and if that is what you want, start a gratitude journal and enjoy it. But a list of nouns leaves the good thing standing there unexplained, like weather. It arrived. Tomorrow it may not.

The causal line changes the grammar. It asks you to say where the thing came from. And when you actually try to answer that, one of three things happens, all of them useful:

• You find you caused it. You called first. You left twenty minutes early. You said the difficult sentence instead of the easy one.
• You find someone else caused it, on purpose. Somebody covered for you, remembered a detail, made a decision that cost them something.
• You find nobody caused it. It was luck, weather, timing, the shape of the day.

Over a run of nights, the proportions become visible. That is information you cannot get from a list of nouns. Someone who believes nothing good in their life is under their control may write fourteen nights and find that a third of the entries begin with "because I." Someone who believes they must engineer every good thing themselves may find how much of it arrived through other people.

The step by step

1. Fix the run before you start. Fourteen nights is a good default. A week is enough to feel the shape. The point of a fixed run is that it ends, and an ending is what makes review possible. Open-ended practices tend to become obligations and then guilt. If you miss a night, add a night at the end or do not; a gap is not a failure and it does not reset anything.

2. Write at night, close to the end of the day. The exercise depends on recall of ordinary detail, and detail decays fast. Doing it the next morning is possible but you will get the headlines only.

3. Name three things that went well. Small is allowed and small is usually better. "The meeting ended early" is a better entry than "I am grateful for my job," because a specific event has a cause and an abstraction does not. If you cannot find three, shrink the unit until you can.

4. Under each, write one line answering why it happened. Not what you felt about it. Not what it means. What produced it. One sentence is enough; two is fine.

5. At the end of the run, read all of it in one sitting. This is not optional garnish. Fourteen nights of causal lines read together is a different document than any single night.

How to write the why line well

This is where the exercise is usually lost. Some patterns that help:

Start the sentence with "because." It sounds mechanical and that is the point. "Because I texted her first instead of waiting." The word forces a causal clause and blocks the drift into commentary.

Name an agent. Somebody or something did something. "Because Dan noticed the error before it shipped" is a cause. "Because things worked out" is not a cause; it is a shrug wearing a sentence.

Prefer the specific verb. Not "because I was prepared" but "because I read the file on the train." The specific version is a thing you could do again on purpose. The abstract version is a compliment to yourself, which is pleasant and useless.

Let yourself take credit when you deserve it. Many people find this the hardest instruction in the exercise. If the good thing happened because you did something, write that you did it. Not "I got lucky with the timing" when you actually left early.

And do not manufacture credit when you do not deserve it. "Because it rained and I like rain" is a completely legitimate entry. The exercise is not a self-improvement audit. It is a record of what caused what, and a fair share of what causes good days is nothing you did.

Do not explain the explanation. One line. If you find yourself writing a paragraph, you have moved into general journaling, which is a fine thing to do, but do it below the exercise rather than inside it.

What the review is for

At the end of the run, read the causal lines only. Cover the good things and read just the "because" clauses down the page. You are looking for two things.

The first is repetition. If the same cause shows up five times in fourteen nights, you have found something that reliably produces good days for you, and you now know it as a fact about your life rather than as a hunch. Sleep, one specific person, leaving the house before nine, saying no to something.

The second is absence. Look at what never appears. Things you assume are central to your wellbeing sometimes do not turn up once in two weeks of causes. That is worth sitting with, without any obligation to act on it.

Both of these require the writing to still exist when you get there, which is the mundane reason to keep the exercise somewhere durable rather than on the back of receipts.

Where this fits with everything else

The three good things exercise is narrow on purpose. It is not a journal. It does not process anything, resolve anything, or make room for a bad day. It asks one question fourteen times and then hands you the answers. Some people run it once, get what they came for, and never do it again. That is a complete outcome, not a lapsed habit.

If you want the wider version afterward, gratitude journal prompts go somewhere different with the same raw material. And if you find the causal line interesting but the nightly structure constraining, the honest move is to keep the line and drop the structure: whenever something good happens, write down why you think it happened.

A note on Yesterself: it is a journaling app built around a loop where each morning brings back one letter from your own past writing, and your evening reply becomes tomorrow's mail. Three good things fits that loop naturally, because a causal line written in October is exactly the sort of thing that is worth reading again in March. Yesterself is not released yet; there is a waiting list on the site if you want to know when it is.

This article describes a writing practice, not a treatment. It is not medical advice, and nothing here diagnoses or manages any condition. If you are having a hard time, please speak with a qualified professional.

Common questions

What is the three good things exercise?

Each night you write down three things that went well that day, and under each one you write why you think it happened. It is usually run nightly for a fixed stretch, often a week or two, rather than forever.

How is it different from a gratitude list?

A gratitude list names the good thing and stops. This exercise adds a causal line under each item, which forces you to say what produced the good thing. That second line is the whole exercise.

What if I cannot think of three things?

Lower the size of the thing rather than skipping the night. A quiet commute or a sandwich that was better than expected counts. The exercise does not require significance, only accuracy.

How long should I keep doing it?

Pick a run length in advance, such as fourteen nights, and stop at the end to read the whole thing back. A short defined run gives you something to review; an open-ended one usually turns into a chore.

Is this a treatment for anything?

No. It is a writing practice, not a clinical intervention, and nothing here is medical advice. If you are struggling, talk to a qualified professional.