To be sure, there are mixed opinions about the utility of getting words-down-any-words-down and powering through to get something on the page. Personally I feel that getting words-down-any-words-down can be very helpful, as I find it much easier to go back and revise than to try and conjure something for the first time.
But how does one power through? I have never attempted the marathon/race to the moon/mountain climb that is NaNoWriMo, but I’m sure that at some point that brain starts yelping, “No! More! Words!”
How do you quell that feeling and power through to keep going?