What do you say no to?
How do you prioritize your life, so that you can get your work (or art) done?
Are there commitments people spring on you, obligations you wish you hadn't said yes to?
Managing one's time is something I've struggled with, and for the most part I can do well--most of the time. Things do get in the way, whether it's a sick child or a dentist appointment or the lawn needs mowing, but knowing how to deal with it can mean all the difference between success and failure.
Well, not really failure, per se. I'd say it's the difference between finishing something and not finishing something.
Prioritize your life. Learn to say no.
Then, you can find the things to say yes to.