According to Wikipedia free writing is a prewriting technique in which a person writes continuously for a set period of time without regard to spelling, grammar, or topic. It produces raw, often unusable material, but helps writers overcome blocks of apathy and self-criticism.
When I go out and shoot I start like this. I will “free write” from anywhere from a roll of film to an hour. I’ve been carefully keeping a record of these images and I hope to have a gallery of them by the end of the year. I find that this warm up if you will keeps the art in my art.