I lay out and mount all my boxes, cans, and drill my holes, etc day one. I have found that a lot of details are not thought of until the electrician starts to ask questions. "Where do you want to switch this from? How high? etc. There seems to be a lot of "Yea, I didn't thind of that." It takes a little bit to do it because there are usually a lot of questions for the gc or ho. When I am done though, I can run wire notstop and not have to wait for answers to where and how.
I have seen guys lay out, mount boxes, drill in a room or a circuit, then on to the next room. Constantly retooling.
