You know one of the disadvantages of working on your book on a daily basis is you don't get to do other ... stuff ... that seems so interesting and entertaining and wonderful and ...
Staring at reruns on TV, racing through the video game you've played a hundred times, or almost-mindlessly Web surfing can seem especially appealing when it's time to write your daily quota. (Not to mention getting a little more sleep instead of getting up earlier to write!)
But with your daily writing, even one day's writing, you end up with something you can hold in your hand. (Print it out! Back it up!) It's something you created. It's yours and yours alone.
It may take a tough hour or more to make, but it never existed before right now. As new as new can be.
Pretty cool, huh?
Just keep writing.