A, B, C is often suggested as a way to sort your to-do list. Simple. Top priority are A’s, would-be-nice-to-do are B’s and C’s are hardly necessary to do at all.
But how to make the decisions? Would word classifications help you more? How about A being Reach (for long-term goals or goals that will give you the most return), B being Standing Still (for tasks that you need to do to keep yourself and your environment up to snuff), and C being for Forget It (unless you use those tasks to procrastinate, and they make you feel good).
Can you come up with some other words to use that will help you understand what role doing your to-dos has in your personal growth and achievement?