The tool is simple but effective.
It requires a user to spend a few extra seconds on initially classifying their tasks, but will ultimately save them hours.
I've designed it to be a mix between a task list and a daily scheduler.
Tasks can be added en masse.
Each task is given an importance and effort rating.
On the due date of the task, it will show up in the matrix, along with other tasks for that day (and incomplete tasks of previous days).
The user can then decide to assign times of the day to complete these tasks while assigning important tasks at their most productive hours.