I've had a similar experience. There is something about scarcity of time that breeds discipline. Whenever I go through a period of life where I have to spend a huge amount of time on some particular task project I always think "man, when this is over I'm going to be able to use all this time to do X,Y,Z. It's gonna be great!" And then the project ends and I essentially waste all of my newly found free time. I end up accomplishing less, even on my side projects somehow.