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Wellness tools
Mindfulness
Jul 16, 2026
3 Min

Three Good Things: Gratitude, With Evidence

The classic gratitude exercise that outperformed expectations in controlled trials. Three items, one why each, ten seconds of feeling.

Three Good Things: Gratitude, With Evidence

Gratitude exercises have a reputation problem: they sound like greeting-card advice. The evidence says otherwise. Psychologist Martin Seligman tested a deliberately tiny intervention he called three good things: each night, write down three things that went well and why they happened. In his trials, a single week of practice was followed by measurable increases in happiness and decreases in depressive symptoms that persisted for months.

Robert Emmons, who has studied gratitude for decades, found the same pattern from a different angle: people randomly assigned to keep gratitude lists reported better mood, more optimism, and even better sleep than people who listed hassles or neutral events. The mechanism seems to be attentional. Your brain tends to rehearse what went wrong; this trains it to also notice what went right.

An Experiment in Gratitude | The Science of HappinessSoulPancakeWatch on YouTube

Guided exercise

Tonight's practice

Step 1 of 3

Write three things that went well

~2 min

They can be tiny: a good coffee, a text from a friend, a task finished. Small and true beats grand and vague.

Check-in

Warm up right now: one good thing from today.

Do this nightly for a week and see what you notice. Most people report that by day four or five, they start spotting good things as they happen, because they know the list is coming. That daytime shift, not the list itself, is the actual exercise.

And if finding three things feels genuinely impossible right now, that is worth taking seriously rather than forcing. A stretch of days where nothing feels good is something to bring to your therapist, or to a conversation with Milo.

Practice tools like this anytime, with progress tracking, in the AhaTherapy app.

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