First Things First By Stephen R. Covey and A. Roger Merrill 
”The authors describe a framework for prioritizing work that is aimed at long-term goals, at the expense of tasks that appear to be urgent, but are in fact less important. This is their 2x2 matrix: classifying tasks as urgent and non-urgent on one axis, and important or non-important on the other axis. Their quadrant 2 has the items that are non-urgent but important. These are the ones they believe we are likely to neglect; but, should focus on to achieve effectiveness.
Important items are identified by focusing on a few key priorities and roles which will vary from person to person, then identifying small goals for each role each week, in order to maintain a holistic life balance. One tool for this is a worksheet that lists up to seven key roles, with three weekly goals per role, to be evaluated and scheduled into each week before other appointments occupy all available time with things that seem urgent but are not important. This concept is illustrated with a story that encourages people to "place the big rocks first."
Delegation is presented as an important part of time management. Successful delegation, according to Covey, focuses on results and benchmarks that are to be agreed in advance, rather than on prescribing detailed work plans.”
First Things First, Simon & Schuster Ltd, 1994