I am intimately acquainted with Procrastination, as are, I'm certain, many of those who might read this post. I have known many creative people to define this lack of motivation to work on the project on which they should be working as the absence of a muse, or inspiration.
Perhaps there simply aren't enough muses for each of us to have our assigned companion by our side when necessary, or perhaps muses prefer our company when there isn't a deadline (self-imposed or not) hanging over us, overshadowing our creativity. Whatever the case may be, I have yet to find a way not to procrastinate. Instead, I have learned to divert my lack of a desire to do what I should be doing into doing something I will at some point need to do – that is, something that may not need to be done right that moment but is nevertheless somewhat productive.