Our culture suffers from chronic busyness, with so many striving to achieve that work-life balance. One problem with being busy is that we tend to project the important things, such as relationships, happiness, or optimal health, to somewheres into the future. Yet, as Oliver Burkeman describes in his TED talk (link in profile) for many that future never arrives, and in the meantime, we live in a constant state of feeling like we are never doing enough.
The truth is that there are an infinite number of things to be done and a finite time period in which to do them. Once we accept that we'll never get all of the things done that we feel we should be doing, we can be liberated from the high standards we've imposed upon ourselves and be on our way to achieving our goals in the present.