I write my first draft in Scrivener, a wonderful program designed for such things. It's so much better than Word in too many ways to go in to but I credit it for helping me write my first book after so many false starts. However its ability to count words, set daily targets and inform you of your deadline is one in particular I love.
The bar changes colour as you progress from an ugly red to a beautiful green as you near 'The End'. As you can see I had a good day today but it follows quite a few where I've fallen far behind. I'm insanely busy at work, my son's been sick, I've been sick, and to be honest I've been dead tired.
But this is where I have to dig deep. It isn't a hobby anymore that I can put away for a couple of days. I have to write and I must remind myself I'm better when i write everyday no matter how little I can get done.
Unlike running, I can write with a cough and cold. My keyboard doesn't complain when I cough all over it. And I have a coloured bar to keep happy.