When you are feeling paralyzed by too many things to keep in your head, use these six areas to prioritize and sort out your efforts. I have listed them in the order in which I deal with each.
There are two types of light in a flash photograph—the light that is already there and the light that your Speedlite creates. Settle on the exposure for your ambient light before you switch on your Speedlite. I typically:
• switch the camera from Aperture Priority into Manual mode when I want to lock in the exposure over several frames.
• underexpose the ambient light so that the subject—when lit by the Speedlite(s)—will jump out a bit from the background.