Use of notes isn't allowed during live games, here, or OTB. For Daily chess it would be fine.
Tips on Chess.

Depends. OTB certainly not. See the Fair Play policy.
Fair Play Policy - Chess.com https://www.chess.com/legal/fair-play

As answered in your previous topic: https://www.chess.com/clubs/forum/view/tips-in-chess
So I've been seriously studying chess books for a little while now, and most of the lessons break it down into points at the end of the chapter (weak squares, active pieces, etc). My question is: am I allowed to write these points down on a piece of paper or something and then refer to them over the course of a game?