One of my New Year's resolutions was to try and write faster. I'd been going along at one thousand words a day, and that did pretty well for a while... but coming into this year, I thought I could do better.
I decided to up it to a 1500 word a day minimum and go from there.
Twenty days later I'm steady at two thousand words a day, sometimes a bit more. Have been keeping it up for a couple of weeks, now.
You never know what you can do until you try. Never get too comfy, always test your limits. You might pleasantly surprise yourself.