I find that when I write down dreams, or thoughts, or stories in a flow-of-consciousness style, I become very relaxed, and equally focused on what I'm writing. The rest of the world seems to melt away, and the words on the page become the only real thing. Time begins to disappear as a thing to be kept track of. Sometimes I'll realize I've been writing for a full hour, and it feels like only ten minutes have gone by.
One woman is calling this "Hypnotic Journaling." There's a bit about it on Moleskinerie, which has a link to her site.
What was the last thing you wrote that you're proud of?