importance
I use Life Balance software to order my list items by importance. This prioritization is richer than the 4 quadrants: all tasks are ranked on a continuum rather than placed into only 4 bins. The tasks that tend to get neglected -- the important but not urgent ones -- often rise to the top of my lists. This feature has been useful in motivating me to do tasks that I would otherwise ignore when they sat on unprioritized lists. My friends and family are happier with me now, and my relationships with them are better, for example, because Life Balance has kicked my butt to do actions that previously always seemed like they could wait till later.
-andersons