Well, Mollie and Helen2014, I don't think I'm ever going to write 50,000 words in one single month - certainly not this year, anyway! Hats off to you!
I've done this three times now and never even come close. On the other hand the garbled scribbles I typed at dawn did eventually get turned into a novel and did eventually get published, so it's always worth it. I work, so have to scribble at odd times. This year I'm ploughing on with three separate stories. Whenever I get stuck on one, I switch to another. I love Nanowrimo, it gets me in the habit of writing fast without re-reading every year. It's amazing what your brain produces if you just write and keep writing. The pep talks on the website are great, too.
Go for it, Grannywriters!