Time management is commonly defined as the various means by which people effectively use their time and other closely related resources in order to make the most out of it, but in a 2001 interview David Allen observed:

You can't manage time, it just is. So "time management" is a mislabeled problem, which has little chance of being an effective approach. What you really manage is your activity during time, and defining outcomes and physical actions required is the core process required to manage what you do. - David Allen

Time management can refer to all of the practices that individuals follow to make better use of their time