Teachers - physical diary or online planner?

[Mathsdebator]

I've been teaching for over 20 years and still haven't got the balance of notes / diary tracking (I strongly suspect i have ADHD)

What do you use to keep on top of meeting notes / things to remember / diary dates etc?

A4 page a day diary. I have used an online version before, but it seems much quicker to update and colour code a physical diary. Lessons to the left. Tasks and materials to the right.

I use a physical planner too. If I lost it I'm not sure what I'd do!