The more I write, the more I think. Getting each thought out on a page makes room for the next and on and on in progression. I've been doing morning pages, an idea from the Artist's Way, for about three months now, with occasional lapses. Each time I spend the half hour it takes me to write 3 or 4 pages long hand, I have new ideas. The initial ideas are always there, but capturing them on paper seems to give me the confidence to let that current idea go and move forward, rather than clinging onto the one idea and spinning in mental circles.