I use notion for organising my university work, shopping lists, monthly goals, etc.
For day to day tasks I use Microsoft todo. Not only does it make a really satisfying noise when you tick things off, it’s also really handy for me in a morning to get everything I need to do for the day physically written dow instead of it being stuck in my head. Also writing down small, easy tasks can help me to feel more productive with my day even if the task is just making lunch or having a shower.
Google Calendar is also my saviour. Super easy to use and makes everything all organised. My friends and I even have our calendars synced, which helps organising plans with them so much easier
Not sure if this is of any use either but I also keep a spending diary so I can stay on top of my finances. I find it’s really helpful for me to physically write that down in a diary and at the end of every week work out how much money can get put into my savings. Staying on top of it all is the key!