I would add a colour element as well. I've been using coloured pens in business for almost ten years now, and the time saved by having that extra dimension of c

I would add a colour element as well. I've been using coloured pens in business for almost ten years now, and the time saved by having that extra dimension of communication (my Shirlaws team are trained in using the same colour scheme globally) is immense. Less so for single theme notebooks (like a recipe list) but for journals (use colours for feelings - red = mad, yellow = glad, pink = lovable etc) or business (red = support, blue = cashflow, black = strategy etc) the side-on view would tell you more than just quantity.