Although the mazes are often free-form and doodle-like, I need to keep track of the paths. Here is an example of my notations tracking paths alongside the final pencil drawing. Arrows are typically the "hero" path that will lead to the end. O's are paths open on both ends that I will eventually attach to a hero or false path. Letters or numbers refer to a specific fork, usually close to the start, so I know where to reconnect looping false paths or eventual solution paths.
Left: Path notations help keep track of the maze. Right: Final maze layout with notations still visible.