I find some of them on my tumblr, a good chunk of them I stumble across on my travels.
I often get a specific image of something in my mind, too, and then feel compelled to seek out the closest thing to it, a picture to match what I see in my imagination. Never quite matches up, tho. :/
Idk, I'm a bit of a visual person. :>
It's really just whatevs catches my weird little hush eyes ~