I like this writing tip by Kim Harrington on not stopping the flow of your writing by using a code when you come to something like a name you don't know, something you need to research, etc. I do this, too, when I'm writing, and it helps. Only I never thought of it so formally; usually I just put a blank link, or some stars, to come back to what I need to work on. I don't always use the same marker (and maybe I should! This is getting me to think about it) but I've found the keep-going approach really helps me.