“Setting priorities requires setting posteriorities as well. A priority is something that you do more of and sooner, whereas a posteriority is something you do less of or later. You are probably already overwhelmed with too much to do and too little time. Because of this, for you to embark on a new task, you must discontinue an old task. Getting into something new requires getting out of another activity. Before you commit to a new undertaking, ask yourself, ‘What am I going to stop doing so that I have enough time to work on this new task?'”

Brian Tracy, via No Excuses! (Page 193)