Writing notes whilst doing photographs can also lead to a clearer idea of where to point the camera.
Without any thought as to what it is you’re observing, it’s very difficult to know where to point the camera.
To make a note such as: ‘this person is somehow in-charge’ means that you would have a nice, clear objective. You then put your feelers out for a situation and moment that shows this.
It won’t always work this way. I would imagine a lot of the time that note-taking and photography will be un-related (the bringing-together of the two comes in the edit) but now and again one will lead to the other on the spot.