If you can live everyday as if it were your last day. That kind of focus would filter out a lot of the crap I imagine. Things you didn't want to do, unhelpful thinking and behaviour etc. but it's very human to waste time and have frailties and to not get the most out of each day. I sometimes imagine what I'd do if I had 6 months to live or something, to get in touch with what my real priorities are. (Then I just go back to my regular life, and time wasting etc.)!
I think when your work or your life is about fulfilling a goal or a passion you have, when you are achieving or doing something you truly believe in, then you can really live more in this way.