Since Science and Nerds are all the rage these days, let's take the scientific approach to this mystery: why are you not writing?
Examine what you are doing instead of writing. Make a little chart, even if you only do it by hand--gasp!--make a chart of yesterday, or whichever day it was that you meant to fill with a word-count, but failed miserably. If it's today, then start at the top with "Read a blog instead."
Followed by "Made a second breakfast instead," or whatever.
The trick is to write down what you did, followed by the word 'instead.' It will help you realized that you chose to do those things instead of writing. You gave them higher priority.
And after you've filled the page, take a look. Were half the things you chose to do silly little time-sucks?
As Sheldon Cooper might conclude, perhaps you don't want to write after all. Maybe the next little section of time-suck can be spent examining why you do or do not want to write after all.
With all the avenues for publication out there--if publication is your goal--you're going to need to a lot of product to sell. If you only needed to be able to say, "I finished the Great American Novel," then feel free to pet your pretty GAN. Trot it out for company. Trim it's toenails now and then. Buy it a pretty bow. But here's the important part:
You don't need to waste your time visiting blogs like this. You might be better off looking for pet accessories.
For the rest of you, those who've come here truly looking for a way to get your butt in the chair, attach an imaginary GPS to your arse and follow it around for a while. It's cheating on you. It's cheating you out of your dream and it's time for an intervention.
DO EET! DO EET NOOOOW!