For me it's any of these things:

People commenting on my art. I deeply cherish the fact that someone has taken time out of their day to say nice things about my work!

People calling me pretty. I get this quite a lot, but it always hits just as it does the first time! 😊

Finding a new song that I end up becoming incredibly addicted to, to the extent that I play said song on repeat throughout the course of the day and then it no longer registers as a song the next day, similar to when you say a word over and over, and it no longer feels like a word? That type of thing... 😂

What are some things that would generally be considered to be trivial/small, that when they happen, never fail to just make your day?