When walking down the street sometimes I look at the world and see something such as statues, benches, street lights, any object that just looks odd, something else about there that I can see.
I don't even see it right away, I have to stare at it for a minute, then pick up my camera and snap a photo. A plain boring straight forward photo, and then I move, low, to the right, to the left, from angle to angle until I find the shot.
There's something there and I can't leave until I find it.
I have to admit that while photographing random stuff, I have sat around staring at an empty chair longer then I care to say.