Ask HN: How do you cultivate positive memories?

I'm not that kind of person who recalls past events spontaneously or on a regular basis. Actually I forget quite a lot and have in general a very bad notion what occured when in my life.

I recently finished reading the book "The Art of Making Memories"[0] which underlines how positive memories contribute to an overall sense of wellbeing and how they become quite important at a later stage in life. I really like the practicality of the tips given in the book and can really recommend it.

I myself keep some kind of audio gratitude journal. Usually I record my voice reciting a circumstance I'm grateful for while sometimes capturing some sounds in the background (for instance waves at a beach or birds in a park or people playing music in the background). Some years ago I made a simple Bash script on my Raspberry Pi which would play a random recording in the morning in order to wake me up. I really love that sensation of recalling a bright memory while lying in the bed, still on the verge between the dream and conscious state of mind.

What is your strategy to cultivate (good) memories? I'm not talking about systems retaining technical knowledge like Anki or org-mode which we already discussed quite a lot here.

[0] https://www.penguin.co.uk/books/311273/the-art-of-making-memories/9780241376058.html