the "almost finished" syndrome

AARRGHH. Does this happen to anybody else? You're writing something, and it's going brilliantly, and then you get to the point where you're one page from the end. Or one paragraph. Or, hell, one sentence, and you just ... stall. When I was an undergrad I used to go for three-hour walks in Colonial Williamsburg in order to avoid writing conclusions. Nowadays I read Harry Potter fansites and pace.

I know what the problem is -- it's that I'm a bit of a closet perfectionist, and every piece of writing is whole and perfect, or at least perfectable, until it's complete, at which point all the cracks and flaws become apparent. Also, the next step after finishing something is putting it before other people, which involves the risk that they might not like it, and it's much safer to let it stay comfortably incomplete.

Is there any cure for this? Besides strict deadlines and unholy amounts of alcohol, I mean?

ETA: Advisor called the intro to my dissertation "a model first chapter." Woo hoo! now if only this godforsaken conclusion can measure up to this rather impossible standard