Popular Life Wheel technique implemented for iPhone.
You can manage your life spheres, add goals, and subtasks.
Idea is very simple:
Choose important life spheres (it is health, career, relationships, money, family and friends, selfdevelopment, life brightness, things by default)
Then you can estimate each life sphere from 1 to 10 based on your satisfactoriness of this sphere.
Then you can create goals and subtasks for each sphere to improve your life.