Being old enough to have gotten through college writing papers on pen and paper, you can still do some editing along the way. Use index cards, as an example - you write an outline in a notebook, you write out sentences and paragraphs for each point on an index card, and then you can shuffle the cards around until you nail down the order in which you want to present the content. Once you have it down, you re-write it all onto paper. And often, then mark up your draft and re-write it again with corrections.

I would never go back to that process, of course. It was painful then, and would feel even worse now. But it was possible.