I use a notebook and write a * followed by a one-line description of the task. If I create a task, I have to do it. When I finish it, I cross out the whole link

I use a notebook and write a * followed by a one-line description of the task. If I create a task, I have to do it. When I finish it, I cross out the whole link. When I finish all the tasks on a page (I put notes in there too) I put a checkmark in the top lefthand corner of the page. I have a todo.txt for work stuff that contains all ongoing todo items.