for me I do it slightly diffrently, it's not good/ bad experiences, I base it on what I am (or not) doing that day
like for me: how was my previous night
have I eaten today
have I drank enough
have I got much on?
how is my chronic pain
all that information helps me know if I'm having a good day or not
I could be having a really bad day and then listen to one of my favorite songs, but it wouldn't make a diffrence- the day's still bad
today is bad: I spent the night reliving abuse, I have horrible chronic pain in my back, I have nothing planned (accept for being on here and checking emails), and all I've eaten of any use is a few grapes.