"Shipping is a feature."

Another good variation on Perfect is the Enemy of Very Good:

"A 50%-good solution that people actually have solves more problems and survives longer than a 99% solution that nobody has because it’s in your lab where you’re endlessly polishing the damn thing. Shipping is a feature. A really important feature. Your product must have it."
-- http://www.joelonsoftware.com/items/2009/09/23.html