I managed to write the required 50,000 words to 'win' Nano. And a few days ahead to boot. When I registered my active participation this year, I had low expectations about the chance to win, but since several online friends do it, I decided to join. Well, it paid off. :-)
It was sheer stubbornness that kept me going some days when I didn't feel like writing after a stressful day at the job. But once I got into the flow, I usually could write a fair bit. Continuing to write the amount of words I did these last 25 days would take too much time off other things - like writing blog posts, for example - but I hope I can take some of the discipline with me into the next months.