How do you track your to-do’s?

I personally use a tracking app and even not that I prepare a to do list a prior day and the next day when the task is done that’s really gives a personal satisfaction

I list them in the morning or evening before, allowing for focus the next day and so no waste of time determining what needs to be done.
I allow flexibility also so that I don’t feel like a prisoner of the list.
Then I mark the tasks that are done 🙂