It's hard. It would be easier if there was a literal bank. I'll tell you, I did one of those goofy things I think I saw on pinterest.

I set up an email account called something like "thatsworthsaving" at gmail. I then set a reminder and about once a week wrote things to that account. The original suggestion was a physical jar full of post it notes, but I wanted to write a bit more. Some weeks it'd be pretty banal and a bit forced but other weeks were huge. I'd write pages and pages. And then I stopped after life got busy -- you know people fall into and out of habits like that. Well anyway, a year or so afterwards, I logged into that email account and was astounded by how much I'd written about and had forgotten. The experience left me incredibly happy but also hyperaware of just how much our brains forget. Or mine, at least. I forgot so much.

I think pairing this sort of memory gardening with the practice of mindfulness (in the sense of not identifying with every anxious or denigrating or angry thought that arises, vis-a-vis Sam Harris et al.) would certainly improve someone's outlook, especially over a lifetime. Lord knows I've been trying: it's called practice for a reason.