I have ADHD so I really struggle with this and need absolutely foolproof systems.
I tend to use a combination of Google Calendar, Google Docs, Trello, and YNAB.
For me what I've found to be essential features:
- The list needs to be able to be automated (for example, setting up recurring tasks) - bujo does not work for me because I simply do not do the task of re-entering the information every day. I know that is part of what makes it work best for some people, though, making them consciously interact with the plan and process regularly.
- It must sync in multiple locations, so that DH can check it, I can check it, I can update it from my PC (where I live) or my phone (surgically attached to me) We are both on Android.
- It needs to be flexible - easy to move something around or change it without it causing a load of complicated knock on effects that need to be fixed manually.
- Cannot be overly saturated with reminders, or I start to ignore them all.
I would recommend you identify what the essential features are for you.
I use google calendar for all appointments and reminders. I set up a widget on my phone so I can see the schedule for the day/week (week is better post corona as there are so few events on there). Set up separate calendars for daily routine, events that affect just me, events that affect DH as well, so I can hide and re-view as necessary e.g. if my daily routine is clogging up the page. It's colour coded. Anything hugely important is in red or orange. Social is yellow. Relating to DC is light blue. Relating to work is dark blue. Travel is even blocked in, in pale blue. Routine related is purple, medical appointments are hospital green, food related is a more plant-y green. Boring tasks are grey. Etc etc. All the school holidays are in there.
I even stick things in like "Phone doctor to make appointment" "Check schedule of garage online" "Research pram systems" and if they don't get done, I move them to another slot in the future so they can get done then.
Google Docs holds my "master to do list" which I check first thing every day, as well as things like spreadsheets for any current projects (due a baby so preparing for their arrival etc)
Trello has our meal plans and shopping list, I title the meal plans by date, which means if I'm feeling lazy I can search old archived boards and just quickly grab an old meal plan that I used in May in some other year, or a couple of months before when I first set it up. I have a widget which allows me to add items one at a time so I can very quickly add anything we have run out of. I tried to set this up using Google Home because people mention that they find this a great solution, but gave up after I could never find where Google stored its shopping list
For the shopping list part, I tend to do an online shopping order on Wednesday to be delivered on Saturday, but if we go into the shop for whatever reason, I can easily re-order the list according to the layout of the supermarket which makes shopping really easy and quick.
YNAB keeps track of any upcoming financial obligations and helps me save for them. This is the only one I pay for, we do pay for extra Google storage as well but that's not needed for the docs, it's more for photos. I find YNAB saves us more than it costs. I put things like passport renewal, MOT, etc in here with the month as part of the category name so every time I check the budget I can see when something is coming up.
Tody is another one for things like changing water filters, running maintenance wash on washing machine, that I really liked. You can pay £5 a year per device to sync it on multiple devices, but it doesn't sync to computer. I stopped using this one though for reasons that I forget and didn't renew the subscription.
I had to get past a mental block about paying subscription fees for organisational tools - in the end I made a category for them in my budget and I consider it paying for the convenience/brain space/service, almost like having a tiny mini digital PA to offload some of these tasks to, and MUCH cheaper! That helped me see the value in it rather than just immediately going oh no, I'm not going to pay for something like that. You would pay extra for a washing machine which had a cycle that works better with your life than a cheaper one which did not, or more for a nursery that fits around your work better than one that did not, so this is not that different. And usually much less than the price difference in those kinds of things.