I don't have anything that I'd call a system. I use a text file for the tasks that I need to do during the week, broken down by day. If I can't finish a task th

I don't have anything that I'd call a system. I use a text file for the tasks that I need to do during the week, broken down by day. If I can't finish a task that day, I move it to the next day's set of tasks with a note about where I left off. Doing that is simple, easy to maintain, and it works for me.