I've been working on a new novel lately. While that isn't particularly worthy of admiration in itself, maybe you'll be more impressed when I tell you that I've been writing it with my thumbs on a keyboard 2" wide.
Instead, I figured out that I can squeeze in ten to fifteen minutes of writing on my phone while I'm feeding the baby. Sounds a bit rough, right? But you know what? I'm managing 500-600 words a day. At that rate, I'll be done with my draft by early June. Not too shabby.
If I can do it, so can you. Pull out your phone or your pocket notebook in line at the bank, on the train during your commute, or while waiting for your coffee. You might only get a few lines down--but that's a few less lines you need to have a completed draft. Need uninterrupted time to get in the drafting groove? Jot down some ideas instead, or write a few journal lines for one of your main characters.
I'd be remiss if I didn't close this post by mentioning the app that I use for my writing. Evernote is an app with versions for your phone and computer that syncs automatically, so there's never any need to do a complicated transfer. My only quibble with it is the lack of a word count feature on the iPhone app, but I get around that by taking a few seconds to copy the text I wrote and pasting it into the Wordcounter.net window. I'm hoping they add word count functionality in the next update!