The juice is worth the squeeze

Lately it feels my mind has been working overtime. Through I'm reluctant to say whether I'm getting paid for it. For the first time in a long time I've sat down to really write. I mean, doing the Advent postings (which I don't think I completely finished (my bad)) was nice but I haven't done any free writing in a while. I haven't come back to stories I started months ago, I haven't written new music. But that's changing.
The other night at work I had a story come in my mind. It was one I knew, but became so foreign. I wanted to tell a story I had experienced, but let someone else tell it. So I took a piece of paper and started writing at the cash register. Because really, what better inspiration is there than an empty store and the sound of the Pillow Pets commercial playing over and over...and over and over? Oh wait, that didn't help at all. But I did do some writing. And then I began thinking: What makes creativity flow? What was it in that moment of the creative juices flowing that created the need to squeeze it out?
So I ask you: All one of you that reads this (maybe two)what gets you going? What makes you sit, stand, dance up and down and topside and _________? Whatever it is that you do creatively? What does your motivation look like? What does your process look like?
I think I'm sad to admit mine is just random. I think too much about the words I'd like to form and the way I'd like to form them that I forget to just write. I lack true motivation. I love telling and hearing stories, but not enough apparently to keep inspired to just do it. And in the moments they come I crank it out and then re-read it the next day or a couple days later to see if I still like it. I mostly don't. Sometimes I do.
So, what about you?