Not sure if call it mental or physical organization, but there is more crossing out of words and whole sentences, words that I try to fit into small spaces, or arrows to/from outlined areas below with more space. Like:

    +--------------+
    |  abcd abcd a |
    | bcd abcd.--\ |
    |            | |
    |  efgh ijkl | |
    | ijkl m nnn | |
    |            | |
    |      +-------+
    |      | abc a |
    |      | abcd  |
    +------+-------+

A technique that I don't know what to call, is the horizontal brace. Like the ASCII 123, but horizontally, to insert something between two words, above or below the line.

A handicap of the notebook, is that you can't find historical data/names/dates so easy, or synonyms... but as I iterate a few times over the text after the first draft, those gaps can be fixed latter while typing the text.