What an interesting thread!
I have an A5 hardback 'journal' in which I use a new double page each week headed 'Wk beg 31 Dec' etc and use it for my To do list and keeping track of online orders. Then I have a diary for my ancient Filofax which I keep upstairs and a downstairs diary. Birthdays are in the calendar on my computer so carry on from year to year.
I like Lemongrove's system of a joint large diary for appointments, but know DH won't agree. His diary is his comfort blanket.
Heated Brush recommendation,please.