In terms of marketing strategies, the 4 P's are Product, Price, Place, and Promotion. The 4 W's of time management, though, are What, When, How, and Who. Yes, these do not all begin with the letter W, but they all represent the fact that as a professional, you have a range of different responsibilities which it is useful to differentiate between for the most effective work-life balance. If you can name the What, When, How, and Who of each of your individual tasks, then you are on the right track.