No Diary for me...I would never check it!
I use a huge calendar that has spaces to write in each days events or weeks etc.
We always had one in our office at work, so no one could say they didn't know, so same thing at home.
The calendar really is very big...and 1st thing you see each morning in the kitchen it stares at you :)
I haven never been a lover of a diary, if it ever got lost I would be in a mess.
I know they are a god send for a lot of people..
I think it is just what your use too, and what really works well for each person.
same for me. You have to have time to get into a phone or laptop computer (which means remembering another thing to do). Before me eyes, in the kitchen, no problems. And, because it's on view to everyone, family members remind one another of what's needing to be done, so it's a back-up system.