Behaviour Change
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Writing Your Best Possible Self

The most-replicated positive psychology exercise there is, and it's just writing.

By Cortisol Curves Editorial Team· Research brief · summarized from the primary source· 4 min read· Updated August 4, 2026

Writing about your future feels like homework you'd assign a teenager. Then you do it, and something odd happens: the day after, the thing you'd been avoiding feels smaller.

What the researchers actually did

King asked participants to write for 20 minutes across several days about their 'best possible self' — a future in which everything had gone as well as it reasonably could — and compared them to people writing about trauma or neutral topics. Peters and colleagues later tested a shorter version, adding guided imagery, and measured changes in positive future expectancies.

What they found

  • Writing about life goals raised subjective wellbeing compared with neutral writing.
  • It produced mood benefits without the short-term distress that trauma writing causes.
  • Shorter, guided versions still increased optimism about the near future.
  • Concreteness mattered — vague aspirations moved the needle less than a described day.

What it means for you

The point isn't to fantasize. It's to make the future specific enough that your brain can plan toward it. That's also why we ask you to give her a name: a named character is something you can check in with on a hard Tuesday. 'What would she do' is a far better prompt than 'try harder'.

What to do with it this week

  • Describe one ordinary Tuesday a year from now, hour by hour, in the version where it went well.
  • Write in the past tense, as though it already happened.
  • Name that version of you — a real name you'd actually say out loud.
  • Re-read it the morning you least want to do the small thing.
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References

  1. King, L. A. (2001). The health benefits of writing about life goals. Personality and Social Psychology Bulletin, 27(7), 798–807. View source

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