Like most - I live with this. I’m going to share a couple of coping mechanisms if that’s ok? Feel free to ignore them- but it might help.
A reporters notepad. It’s small enough to carry easily but large enough to be easy to write a useful amount in.
Daily to do lists -notes while you are on a phone call or in an appointment, or you can even leave it out for your mother to write her requests in.
If you think the other stuff you write in it you don’t want seen by others then my other very favourite aide memoire is a chalk board . ( well actually I have several


). I have one for things we run out of in the kitchen/ house so I can put it on the shopping list- one in the bedroom for things I need to do re self care/ achievements.
I have one in our farm feed room for things me and my friend discuss so ‘we both’ ( me, it’s a polite way she indulges me) remember feed plans for the animals and any medication and upcoming appointments with vets/farrier/etc
Calendar.
I have a shared calendar on my phone with my husband that also can include some others on some details. E..g only DH and I need to know my therapy appointments really ( though friend actually does and remembers) but if friend or we are away or taking an evening off animals we can share it in the calendar and lab for the other to pick up the slack . If I don’t see the calendar alert I forget, and if it’s in my calendar I cannot double book.
Routine - This is so very boring, and if like me , you have other health issues, impossible to do religiously. But I have a few anchor points. At two particular times in the day every animal on the property gets fed and water checked ( some get fed more, but there are two occasions where everyone eats). Those times are routine and I usually feed the dogs at those times and often the cats. That’s an anchor . I use that time to check the calendar ( which also has audio alerts on it) and my lists). I have dog walk and training . I have a ‘routine/ritual’ my T had me begin at bedtime. The last I have only fails to do a very few times in the last few years and if I do it’s a time to stop, take stock and address what ever is going adrift.
Weekly I have other anchors,
These routines help life run smoothly and some things don’t need always to be ‘as hard work’ to be remembered because they become habit.
I’m often awed by the ability of others here to retain stuff and they inspire me because one day I might too :)