
Captionists worldwide usually take a picture and write the story for it real quick. I've tried different approaches, but somehow, I ended up more comfortable with finishing the story first, so as to not be restricted by an existing picture, which is harder to adjust to the text than the other way.
That's the backwards man I am: either I invent something new and interesting through the experience, or I end up learning why people to things a certain way through my own inconvenience.