Thanks for reminding me of this. Ten years ago I did try this, but it was using a website... www.750words.com - I seem to have lost the login details for the moment. However doing it longhand might be the more interesting way to go. Not sure I could do it first thing without sustanance. But I did make myself do it in one sitting.
Yeah, I've always found that my mind wanders too much when I'm at the keyboard. Longhand gives me back the connection as well as activating the playful schoolboy in me :)
I just restarted my account at 750words and bashed one out. I was pleased so I re-posted to my blog here as a motivation! https://steemit.com/writing/@jedb/life-get-one