It has been said that to achieve anything you desire you need only write down what you need to do today, put it in order from most important to least, and then do it in that order. If you do this consistently you can achieve anything.
The problem for most of us is that we don't really know how to gauge the importance of a task - or even if we should be doing it.
Dewitt Eisenhower would draw a 2 by 2 grid (See the blog post for a better picture) and label one axis as "urgency" and the other as "importance". Then he would place his tasks in this grid based on how urgent and how important they were. From this he was able to decide what to do first, what to do later, what to delegate to others, and what to get rid of altogether.
Prioritization - How to Find Your Focus | The Master Achiever
This is the true secret to finding focus and achieving your dreams - knowing what to do, knowing when to do it, and then doing it.
David T. McKee