I have finally found the ideal (for me anyway) Task List Program. It is called ToDoList and from AbstractSpoon Software. And it is free (CC Attribution Share-Alike 2.5). It is straightforward but allows the needless complexity that makes me happy sometimes. All tasks can have sub tasks, there are priorities and levels and colors and … well you get it. PS: You can turn most of that off if it is not something you like.

http://abstractspoon.com/tdl_resources.html