I work best when I have deadlines or time limits. I learned this in college when I had weeks to work on a paper, but I started it only a few hours before the deadline. I work well under pressure, and if I have too much time to mull things over then I get nervous or awkward or I over-analyze and I talk myself out of doing it altogether.
NaNoWriMo was awesome for me because I got to start, work on, and "finish" an entire project with a specific word and time goal. But I've struggled with finishing up the novel that I've been working on for about three years. It was easy when I started it because I had a writing class with weekly deadlines and word-count expectations. But now, I'm on my own.
The other day someone on Twitter asked who was up for a 1 hour writing challenge. I responded that I was, and she set the goal of 1,000 words in one hour. We started right then.
So, here's the thirty minute challenge: Write 300 words in 30 minutes. Start now. Don't stop. Don't correct. Just write write write for thirty minutes (or until you get 300 words). Thirty minutes from now, post a comment and let me know how it went.