I've found that the productivity in my life has been directly related to my habits good or bad. When I worked out every morning at 5:30 a.m. during my junior and senior years of high school, my productivity went through the roof my first few periods of the day. When I worked at a coffee shop and downed double shots to keep myself perky during work(-y), I found that my productivity suffered when I went home.
Now that I'm writing 2,500 words every morning (that is more recently accompanied by a laptop bike ride), I'm finding that I'm able to get a ton of stuff done each day. While I would like to be able to market my books 24/7 when I'm not writing them, my other tasks like my freelance work, housework and my fun activities on the side have been much more tended to then they were when I wasn't on the writing challenge. If you can make it your habit to get something done each day, you'll find that other things get done as well. Hooray!
I wrote an article today about giving up caffeine and I came very close to finishing at least the beginning of all 500 prompts.