A tip for other writers who suffer from THE FEAR: I'm using a timer (Tomighty Timer http://tomighty.org/ -- open-source, obnoxious, can make a tick-tock noise, harder to ignore than web timers) and timing editing sprints in a spreadsheet and it's helping a lot.
Separating my wordcount goals for drafting and editing helped a lot. Shooting for 3k/hour editing keeps away the brain weasels.
I learned this from Chris Fox's "5,000 Words an Hour" (free on his site).
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