To be inspired is a magical thing. You could be at the store in the gizmo aisle after midnight, and suddenly the thought beams into your head: "Eureka! The OC I've been doing stuff for should be named Pablo Figglehorn!"
As someone who frequents a lot of places, I have begun to realize that the majority of my epiphanies (if you can call them that) happen in the same four places. Kind of ties into what I said here about creative essence.
I used to think the chances of thinking of something were evenly distributed depending on the place, but it seems this isn't the case, and now I wonder "if I go there, will I think of something" and look forward to them.
For a lack of a better way of asking, what's your "unsuspecting epiphany place"? A store? Somewhere at home? Somewhere in the areas you like to wander?