I started out writing longhand, in a series of notebooks, going through pens at a prodigious rate, and working on my laptop desk or at the pool. Then I would type everything up on the computer, and edit, edit, edit...
It got colder, and I moved indoors, and eliminated the middle man, so to speak, and now I work on the computer. I still make notes to myself on all sorts of things, including scraps of paper, post-it notes, and my arm.
Many, many years ago, I had an old Royal typewriter, with the cloth ribbons, and I used to love pounding away on that old thing...