As I mentioned, I'm starting a new series on my blog to offer tips to writers on how to make fast-drafting easier, more effective, and more enjoyable. Some of this advice comes from my forthcoming book, Fast Fiction, some are just from my continuing exploration of the subject. If you have your own tips on fast-drafting, or if you try some of my tips, I'd love to hear of your experience in the comments.
When you awake each morning, while your brain is still in that fuzzy half-dream state, write for five minutes before you speak to anybody.
This is one of the best times of days to come up with new and creative ideas, before you're bombarded by responsibilities and cares about getting through every day life.
Make this a habit. Do this every day and stockpile your ideas. If you want to write for more than five minutes, go for it! But even if you just do the five, keep a special notebook (or computer file) for this purpose, so you can keep all your new ideas in one place.
You see, the difficulty with fast-drafting is not writing or typing the words out. The difficulty is having the ideas of what to write about. Try this for a week. Stockpile your ideas and see what a difference it makes to your drafting!