I guess the only rule here is nothing super huge, gotta be something small that you still look back on from time to time.
One of mine, and the first that comes to my head, is this one time I was in rural Ireland. There was a pasture full of cows next to a church my group and I were at for a wedding, and while waiting for things to start I got drunk and bored. Decided to get up close to the cows since I'd never seen one in person before that close.
Cow came up to me all friendly like, started licking my face, nibbled on my tie a little bit, and then I backed away. Not before getting a sweet pic of me an the cow kissing tho.
I named it Gertrude.
One night the summer before I went off to college I was up in the middle of the night and I decided to go out on my back porch. It was a warm summer night with an absolutely clear sky. I just sat there and let my mind wander and was just extremely comfy.
I've done this since but I've never been able to recreate the comfiness of that night, like the feelings evoked by Nujabes or one of those lofi hip hop playlists, but brought on solely by the moon and the stars. Maybe something about being in a "liminal stage" in my life.