Time management is the ability to plan and control how someone spends the hours in a day to effectively accomplish their goals. This involves juggling time between the domains of life—work, home, social life, hobbies. It is important to establish clear goals and priorities in order to set aside non-essential tasks that can eat up time, and to monitor where the time actually goes.
In the 1970s, the ABC prioritization method was the rage. Any project or action item landing on the A list was deemed most important, with second most important items appearing on the B list, and C items marked as least important. Over time, various iterations of this formula floated through the zeitgeist. For example, the most unpleasant tasks wound up on the A list in order to get them out of the way. Today, the work landscape has changed somewhat, with more and more tasks landing on the "Most Important" list.