Something I've noticed - and I really noticed this when I got my first publication contract for Transition Testing: Cornerstone of Database Agility - is that there is nothing like a contract to focus your attention on a project. It's not even the deadline, which I feel was extremely generous on the part of my publisher. It's those words that rattle around in the back of your mind...
This is really happening. The ball is in your court, now.
There is nothing like it to motivate someone. At least, there is nothing like it to motivate me.