A "productivity system" is the name of the process and any tools you use to make sure you do the things you want and need to do. It might also be a name for something someone might sell you, all in the name of "doing more in less time". What's the simplest productivity system which will let you get a grip on your life?
According to Facebook and Pinterest, life is splendid, inspirational and good-looking. According to anyone you ask, yourself included, life is busy and overwhelming. But why are we constantly busy and tired?