(Incidentally, e-mail or email? NYTimes seems to favor the hyphen, but most people don't use it. I feel a little like a 1920s person writing "to-day" when I use it but, like Miss Manners, I want to be perfectly correct.)
The other technique I tried is something I thought of as "sprints." With the idea that I can stand anything for 20 minutes, I set the timer for 20 minutes and write down my progress at the end. It may be a lot of words or only a few, but it looks like progress. An alternative system is to stop at the end of each hour and count the words.
Now, counting words isn't the measure of whether a piece is good or lousy, or even whether you'll have to scrap what you've written because it's so bad or goes in the wrong direction. But what it does is allow me to say this to the voices in my head: "I'm sitting here in the chair. I'm not reading election news on nytimes.com or talkingpointsmemo.com. And I am writing words. The only way to get from here to done is to write words, and I am doing that."
Deepak Chopra or some of the other fancy spiritual folks could probably make something high-sounding out of this (can you tell I have never read him?) but plain and practical is good enough for now.