As you know, I'm taking part in NaNoWriMo this month (National Novel Writing Month). A large part of the NaNoWriMo experience is writing freely, without edit, and just keeping going. That's one of the reasons that it doesn't suit a lot of writers. Some people can just go for it full-pelt, while others need to stop and consider, research, edit a bit, and so on.
So in honour of NaNoWriMo, the exercise I'm setting this month is to write for at least twenty minutes in the spirit of 'full-pelt'. Don't plan. Don't think. Just write. Don't edit and read back. Just keep going.