The urge to procrastinate is a good thing! I never thought I would say this, but I have been introduced to a radical new idea thanks to Seth Godin.
In his new book The Icarus Deception (which I highly recommend) he refers to the urge to procrastinate as a sign that you are about to make some really good art. Since creating really good art also makes you vulnerable, it also activates your sense of self-preservation. Your sense of self-preservation then activates your “fight or flight” response, which manifests as an urge to put off making the art. Therefore, the urge to procrastinate is a sign that you are about to create something really good.
That is the best explanation I have ever heard for the common experience of artists, writers, and musicians – that it is a joy to practice your art, but so very difficult to get started. So the next time I feel like procrastinating instead of practicing, I should paradoxically feel a stronger urge to practice because I know I will accomplish something really good.